2012 MERCEDES-BENZ CLS-Class o2 sensor

C
Calling up a malfunction see Display messages
Capacities
see Technical data
Car
see Vehicle
Care
Carpets .......................................... 292
Car wash ........................................ 286
Display ........................................... 290
Exterior lights ................................ 289
Gear or selector lever ....................291
Matte finish ................................... 288
Night View Assist Plus ...................290
Notes ............................................. 285
Paint .............................................. 287
Plastic trim .................................... 290
Power washer ................................ 287
Rear view camera .......................... 289
Roof lining ...................................... 292
Seat belt ........................................ 292
Seat cover ..................................... 291
Sensors ......................................... 289
Steering wheel ............................... 291
Tail pipes ....................................... 290
Trim pieces .................................... 291
Washing by hand ........................... 287
Wheels ........................................... 287
Windows ........................................ 288
Wiper blades .................................. 289
Wooden trim .................................. 291
Cargo tie down rings ......................... 260
Car wash (care) ................................. 286
CD player/CD changer (on-board
computer) .......................................... 203
Cell phone see Mobile phone
Center console
Lower section .................................. 31
Lower section (AMG vehicles) ..........32
Upper section .................................. 30
Central locking
Automatic locking (on-board
computer) ...................................... 211
Locking/unlocking (SmartKey) ........72Changing bulbs
Important safety notes ..................112
Overview of bulb types ..................113
Reversing lamps ............................ 113
Child-proof locks
Important safety notes ....................59
Rear doors ....................................... 59
Children
In the vehicle ................................... 55
Restraint systems ............................ 55
Child seat
LATCH-type (ISOFIX ) child seat
anchors ............................................ 57
Special seat belt retractor ...............57
Top Tether ....................................... 58
Cigarette lighter ................................ 265
Classification system for
occupants (OCS) Faults ............................................... 47
Operation ......................................... 43
System self-test ............................... 46
Climate control
3-zone automatic climate control ..121
Controlling automatically ...............123
Cooling with air dehumidification ..122
Defrosting the windshield ..............125
Demisting the windows .................. 126
Dual-zone automatic climate
control ........................................... 119
Important safety notes ..................118
Indicator lamp ................................ 123
Maximum cooling .......................... 125
Notes on using automatic climate
control ................................... 120, 122
Overview of systems ......................118
Problems with cooling with air
dehumidification ............................ 123
Problem with the rear window
defroster ........................................ 126
Rear control panel .........................121
Refrigerant ..................................... 350
Setting the air distribution .............124
Setting the airflow .........................124
Setting the air vents ......................127
Setting the climate mode (AIR
FLOW) ............................................ 123
Setting the temperature ................1236Index

Low-beam headlamps ....................107
Parking lamps ................................ 106
Setting the brightness of the
ambient lighting (on-board
computer) ...................................... 209
Setting the brightness of the
display/switch (on-board
computer) ...................................... 209
Setting the color of the ambient
lighting (on-board computer) .........210
Switching Adaptive Highbeam
Assist on/off ................................. 209
Switching the daytime running
lamps on/off (on-board
computer) ...................................... 209
Switching the daytime running
lamps on/off (switch) ....................107
Switching the exterior lighting
delayed switch-off on/off (on-
board computer) ............................ 210
Switching the surround lighting
on/off (on-board computer) ..........210
Turn signals ................................... 108
see Changing bulbs
see Interior lighting
Light sensor (display message) ....... 226
LIM indicator lamp Cruise control ................................ 155
DISTRONIC PLUS ........................... 159
Loading guidelines ............................ 256
Locking see Central locking
Locking (doors)
Automatic ........................................ 80
Emergency locking ........................... 81
From inside (central locking
button) ............................................. 80
Locking centrally
see Central locking
Locking verification signal (on-
board computer) ............................... 211
Low-beam headlamps Display message ............................ 224
Setting for driving abroad
(symmetrical) ................................. 106
Switching on/off ........................... 107
Luggage net ....................................... 258Lumbar support
Adjusting the 4-way lumbar
support ............................................ 97
Luxury head restraints ....................... 94
M
M+S tires ............................................ 316
Maintenance see ASSYST PLUS service interval
display
Malfunction message
see Display messages
Massage function (PULSE) ................. 97
Matte finish (cleaning
instructions) ...................................... 288
mbrace Call priority .................................... 271
Display message ............................ 220
Downloading destinations
(COMAND) ..................................... 272
Emergency call .............................. 269
Important safety notes ..................267
Locating a stolen vehicle ...............273
MB info call button ........................271
Remote vehicle locking ..................273
Roadside Assistance button ..........270
Search & Send ............................... 272
Self-test ......................................... 268
System .......................................... 268
Vehicle remote unlocking ..............272
Mechanical key
Function/notes ................................ 75
Locking vehicle ................................ 81
Unlocking the driver's door ..............81
Memory card (audio) ......................... 203
Memory function ............................... 102
Message memory (on-board
computer) .......................................... 216
Messages see Display messages
Mirrors
see Exterior mirrors
see Vanity mirror
Mobile phone
Menu (on-board computer) ............204
Modifying the programming
(SmartKey) ........................................... 75
12Index

Parking brakeDisplay message ............................ 219
Notes/function .............................. 151
see Parking brake
PARKTRONIC
Deactivating/activating .................173
Driving system ............................... 171
Function/notes ............................. 171
Problem (malfunction) ...................175
Range of the sensors .....................172
Warning display ............................. 173
PASSENGER AIRBAG OFF indicator
lamp ...................................................... 43
Plastic trim (cleaning instructions) . 290
Power washers .................................. 287
Power windows see Side windows
PRE-SAFE ®
(Preventive occupant
safety system) Display message ............................ 220
Operation ......................................... 48
PRE-SAFE ®
Brake (vehicles with
DISTRONIC PLUS) Display message ............................ 220
Function/notes ................................ 67
Warning lamp ................................. 251
PRE-SAFE ®
Brake (vehicles with
DISTRONIC PLUS) Switching on/off ........................... 207
Preventive occupant safety
system
see PRE-SAFE ®
(Preventive
occupant safety system)
Product information ............................ 21
Program selector button .................. 143
Pulling away (automatic
transmission) ..................................... 135
Q
Qualified specialist workshop ........... 22
R
RACE START (AMG vehicles) ............. 167
RACETIMER (on-board computer) .... 213
Radar sensor system
Activating/deactivating .................211
Display message ............................ 230
Radio
Selecting a station .........................203
see separate operating instructions
Reading lamp ..................................... 111
Rear axle level control (AMG
adaptive sport suspension
system) .............................................. 170
Rear compartment Setting the air vents ......................129
Setting the temperature ................124
Rear lamps
see Lights
Rear seat
Display message ............................ 238
Rear seat (folding the backrest
forwards/back) ................................. 259
Rear view camera Cleaning instructions .....................289
Function/notes ............................. 178
Rear-view mirror
Dipping (automatic) .......................101
Rear window blind ............................ 264
Rear window defroster Problem (malfunction) ...................126
Rear window heating
Switching on/off ........................... 126
Refueling
Fuel gauge ....................................... 27
Important safety notes ..................147
Refueling process ..........................148
see Fuel
Remote control
Garage door opener .......................273
Reserve (fuel tank)
see Fuel
Reserve fuel
Display message ............................ 229
Warning lamp ................................. 248
see Fuel
Residual heat (climate control) ........ 127
Restraint system see SRS (Supplemental Restraint
System)
Roadside Assistance (breakdown) .... 2214Index

Roller blindsee Roller sunblind
Roller sunblind
Rear window .................................. 264
Roof carrier ........................................ 261
Roof lining and carpets (cleaning
guidelines) ......................................... 292
Roof load (maximum) see Technical data
Route
see Route guidance (navigation)
Route guidance (navigation) ............ 202
S
Safety Children in the vehicle .....................55
Child restraint systems ....................55
Occupant Classification System
(OCS) ............................................... 43
Overview of occupant safety
systems ........................................... 36
Safety systems
see Driving safety systems
Seat belts
Adjusting the driver's and front-
passenger seat belt .........................53
Adjusting the height ......................... 53
Belt force limiters ............................ 54
Cleaning ......................................... 292
Correct usage .................................. 51
Emergency Tensioning Devices ........ 54
Fastening ......................................... 52
Important safety guidelines .............50
Releasing ......................................... 53
Safety guidelines ............................. 37
Special seat belt retractor ...............57
Switching belt adjustment on/off
(on-board computer) ......................212
Warning lamp ................................. 241
Warning lamp (function) ................... 53
Seats
Active multicontour seat ..................96
Adjusting (electrically) .....................94
Adjusting the 4-way lumbar
support ............................................ 97
Adjusting the head restraint ............94
Cleaning the cover .........................291
Correct driver's seat position ........... 92
Important safety notes ....................93
Multicontour seat ............................ 96
Seat backrest display message .....238
Seat heating problem ......................98
Seat ventilation problem ..................98
Storing settings (memory
function) ........................................ 102
Switching seat heating on/off .........97
Switching the seat ventilation on/
off .................................................... 98
Sensors (cleaning instructions) ....... 289
Service see ASSYST PLUS service interval
display
Service interval display
Displaying service messages .........285
Hiding service messages ...............285
Notes ............................................. 285
Service messages ..........................284
Service menu (on-board computer) . 208
Service products Brake fluid ..................................... 350
Capacities ...................................... 347
Coolant (engine) ............................ 350
Engine oil ....................................... 349
Fuel ................................................ 347
Important safety notes ..................346
Refrigerant (air-conditioning
system) .......................................... 350
Washer fluid ................................... 351
Settings
Factory (on-board computer) .........212
On-board computer .......................208
Setting the air distribution ............... 124
Setting the airflow ............................ 124
SETUP (on-board computer) ............. 213
Side impact air bag ............................. 41
Side marker lamp (display
message) ............................................ 225
Side windows Convenience closing feature ............87
Convenience opening feature ..........87
Important safety information ...........86
Opening/closing .............................. 86
Problem (malfunction) .....................88
Resetting ......................................... 88Index15

Useful information
i This Operator's Manual describes all
models and all standard and optional
equipment of your vehicle available at the
time of publication of the Operator's
Manual. Country-specific differences are
possible. Please note that your vehicle may
not be equipped with all features
described. This also applies to safety-
related systems and functions.
i Please read the information on qualified
specialist workshops ( Y page 22).
Occupant safety
Overview of occupant safety
In this section, you will learn the most
important facts about the restraint system
components of the vehicle.
The restraint system consists of:
R seat belts
R child restraint systems
R LATCH-type (ISOFIX) child seat anchors
Additional protection is provided by:
R SRS (Supplemental Restraint System)
R NECK-PRO head restraints/NECK-PRO
luxury head restraints
R PRE-SAFE ®
R Air bag system components with:
- PASSENGER AIR BAG OFF indicator lamp
- front-passenger seat with Occupant
Classification System (OCS)
The different air bag systems work
independently of each other. The protective
functions of the system work in conjunction
with each other. Not all air bags are deployed
in an accident.
GWARNING
Modifications to or work improperly
conducted on restraint system components
or their wiring, as well as tampering with
interconnected electronic systems, can lead
to the restraint systems no longer functioning
as intended.
Air bags or Emergency Tensioning Devices
(ETDs), for example, could deploy
inadvertently or fail to deploy in accidents
although the deceleration threshold for air
bag deployment is exceeded. Therefore,
never modify the restraint systems. Do not
tamper with electronic components or their
software.
i See "Children in the vehicle"
( Y page 55) for more information on
infants and children traveling with you in
the vehicle and restraints for infants and
children.
SRS (Supplemental Restraint System)
Introduction
SRS consists of:
R the 6 SRS warning lamp
R air bags
R air bag control unit (with crash sensors)
R Emergency Tensioning Devices
R belt force limiters
SRS reduces the risk of occupants coming
into contact with the vehicle's interior in the
event of an accident. It can also reduce the
effect of the forces to which occupants are
subjected during an accident.
SRS warning lamps
SRS functions are checked regularly when
you switch on the ignition and when the
engine is running. Therefore, malfunctions
can be detected in good time.
The 6 SRS warning lamp in the instrument
cluster lights up when the ignition is switched
on. It goes out no later than a few seconds
after the engine is started.
36Occupant safetySafety

It is important for your safety and that of your
passenger to have deployed air bags replaced
and to have any malfunctioning air bags
repaired. This will help to make sure the air
bags continue to perform their protective
function for the vehicle occupants in the
event of a crash.
Front air bags
The front air bags increase protection for the
driver's and front-passenger's head and
chest.
Driver's air bag : deploys in front of the
steering wheel; front-passenger front air
bag ; deploys in front of and above the glove
box.
They are deployed:
R in the event of certain frontal impacts
R if the system determines that air bag
deployment can offer additional protection
to that provided by the seat belt
R if the seat belt is fastened
R independently of other air bags in the
vehicle
If the vehicle overturns, the front air bags are
generally not deployed unless the system
detects high vehicle deceleration in a
longitudinal direction.
Your vehicle has adaptive, two-stage front air
bags. In the event of a collision, the air bag
control unit evaluates the vehicle
deceleration. In the first deployment stage,
the front air bag is filled with enough
propellant gas to reduce the risk of injuries.
The front air bag is fully deployed if a second
deployment threshold is exceeded within a
few milliseconds.
The deployment of the front-passenger front
air bag is also influenced by the weight
category of the front passenger, which is
determined by the Occupant Classification
System (OCS) ( Y page 43).
The lighter the passenger side occupant, the
higher the vehicle deceleration rate required
(predicted at the start of the impact) for
second stage inflation of the front-passenger
front air bag. In the second stage, the front
air bags are inflated with the maximum
amount of propellant gas available.
The front air bags are not deployed in
situations where a low impact severity is
predicted. You will then be protected by the
fastened seat belt.
The front-passenger front air bag will only
deploy if:
R the system, based on the OCS weight
sensor readings, detects that the front-
passenger seat is occupied.
R the 45 indicator lamp in the center
console is not lit, ( Y page 43).
R the air bag control unit predicts a high
impact severity.
Knee bagsGWARNING
Observe "Important safety notes"
( Y page 38).
40Occupant safetySafety

Knee bags provide increased protection for
the driver and front passenger against the risk
of:
R knee injuries
R thigh injuries
R lower leg injuries
Driver's knee bag : deploys underneath the
steering column and front-passenger knee
bag ; underneath the glove box. They
deploy together with the front air bags. They
are designed to operate together with the
front air bags in frontal impacts if certain
thresholds are exceeded. The knee bags
operate at best in conjunction with correctly
positioned and fastened seat belts.
Side impact air bagsGWARNING
The pressure sensors for side impact air bag
control are located in the doors. Do not
modify any components of the doors or door
trim panels including, for example, the
addition of door speakers.
Improper repair work on the doors or the
modification or addition of components to the
doors create a risk of rendering the side
impact air bags inoperative or causing
unintended air bag deployment. Work on the
doors must therefore only be performed by
qualified technicians. Contact an authorized
Mercedes-Benz Center.
GWARNING
Only use seat covers which have been tested
and approved by Mercedes-Benz for your
vehicle model. Using seat covers or other seat
coverings can cause a malfunction of the side
impact air bags and/or the pelvis air bags.
Contact an authorized Mercedes-Benz Center
for availability.
When deployed, the side impact air bags offer
additional protection for the thorax of the
vehicle occupants on the side of the vehicle
on which the impact occurs. However, they
do not protect the:
R head
R neck
R arms
Front side impact air bags : and rear side
impact air bags ; deploy next to the outer
seat cushions.
The side impact air bags are deployed:
R on the side on which an impact occurs
R at the start of an accident with a high rate
of lateral vehicle deceleration or
acceleration, e.g. in a side impact
R independently of seat belt use
R independently of the front air bags
R independently of the ETDs
If the vehicle overturns, the side impact air
bags are generally not deployed. They are
deployed if the system detects high vehicle
deceleration or acceleration in a lateral
direction and determines that side impact air
bag deployment can offer additional
protection to that provided by the seat belt.
Side impact air bags will not deploy in side
impacts which do not exceed the system's
preset deployment thresholds for lateral
acceleration/deceleration. You will then be
protected by the fastened seat belt.
If the OCS detects that the front-passenger
seat is not occupied and the front-passenger
seat belt is not fastened (the belt tongue is
Occupant safety41SafetyZ

Rindependently of seat belt use
R if the vehicle overturns and the system
determines that window curtain air bag
deployment can offer additional protection
to that provided by the seat belt
R independently of the front air bags
Window curtain air bags : will not deploy in
impacts with deceleration rates which do not
exceed the system's preset deployment
thresholds for vehicle deceleration or
acceleration. You will then be protected by
the fastened seat belt.
Occupant Classification System
(OCS)
How the occupant classification
system works
The Occupant Classification System (OCS)
categorizes the occupant on the front-
passenger seat by means of a weight sensor.
The front-passenger front air bag and the
front-passenger knee bag are deactivated
automatically for certain weight categories.
The 45 indicator lamp shows you the
current status. When the 45 indicator
lamp is illuminated, the front-passenger front
air bag and the front-passenger knee bag are
deactivated.
The system does not deactivate:
R the side impact air bag
R the pelvis air bag
R the window curtain air bag
R the Emergency Tensioning Devices
To be classified correctly, the front passenger
must sit:
R with the seat belt fastened correctly
R in a position that is as upright as possible
with their back against the seat backrest
R with their feet on the floor
If the front-passenger's weight is transferred
to another object in the vehicle (e.g. by
leaning on armrests), OCS may not be able to
approximate the occupant's weight category.
If the front-passenger seat, the seat cover or
the seat cushion are damaged, have the
necessary repair work carried out at an
authorized Mercedes-Benz Center.
For safety reasons, Mercedes-Benz
recommends that you only use seat
accessories which have been approved by
Mercedes-Benz.
Both the driver and the passenger should
always use the 45 indicator lamp as
an indication of whether or not the passenger
is properly positioned.GWARNING
If the 45 indicator lamp illuminates
when an adult or someone larger than a small
individual is in the front-passenger seat, have
the front passenger reposition himself or
herself in the seat until the 45
indicator lamp goes out.
In the event of a collision, the air bag control
unit will not allow front-passenger front air
bag deployment when the OCS has classified
the front-passenger seat occupant as
weighing as much as or less than a typical 12-
month-old child in a standard child restraint
or if the front-passenger seat is classified as
being empty.
When the OCS senses that the front-
passenger seat occupant is classified as
being up to or less than the weight of a typical
12-month-old child in a standard child
restraint, the 45 indicator lamp will
illuminate when the engine is started and
remain illuminated, indicating that the front-
passenger front air bag is deactivated.
When the OCS senses that the front-
passenger seat is classified as being empty,
the 45 indicator lamp will illuminate
when the engine is started and remain
illuminated, indicating that the front-
passenger front air bag is deactivated.
When the OCS senses that the front-
passenger seat occupant is classified as
being heavier than the weight of a typical 12-
month-old child seated in a standard child
Occupant safety43SafetyZ