1, 2, 3 ...
12 V socket ........................................ 133A
ABS (Anti-lock Brake System) Display message ............................ 201
ABS (Anti-lock Braking System)
Function/notes ................................
47
Accessories and conversions
see Add-on equipment
Active Service System (ASSYST) .....167
Add-on equipment ............................. 276
ADR Working speed governor (ADR) ...... 117
Air bags
Front air bag (driver, front
passenger) ....................................... 39
Important safety notes .................... 38
Safety guidelines ............................. 37
Side impact air bag .......................... 40
Window curtain air bag ....................41
Air conditioning in the rear
compartment
see Climate control .......................... 97
Air-conditioning system
Air vents in the roof duct ...............102
Refrigerant ..................................... 161
see Climate control .......................... 97
Air distribution
Setting ........................................... 102
Air filter
Indicator lamp ................................ 195
Airflow
Setting ........................................... 102
Air pressure
see Tire pressure
Air-recirculation mode ......................104
Air vents Setting ........................................... 101
Alarm system
see ATA
Antifreeze additives
see Coolant ................................... 160
Anti-lock Braking System
see ABS Anti-Theft Alarm system
see ATA
Anti-theft system
ATA (Anti-Theft Alarm system) .........61
Armrests .............................................. 68
Ashtray ............................................... 128
ASR (Acceleration Skid Control) ........48
Activating/deactivating ................... 49
ASSYST
see Active Service System
(ASSYST) ........................................ 167
ATA (Anti-Theft Alarm)
ATA troubleshooting ...................... 212
ATA (Anti-Theft Alarm system)
Activating/deactivating ................... 62
Function ........................................... 61
Switching off the alarm .................... 62
Audible warning signal .....................212
Automatic car wash .......................... 164
Automatic headlamp mode ................90
Automatic locking ............................... 55
Automatic transmission ................... 113
Driving tips .................................... 115
Malfunction .................................... 214
Releasing the parking lock
manually ........................................ 246
Shift ranges ................................... 114
Touchshift ...................................... 114
Transmission oil change ................158
Auxiliary heater
see Auxiliary heating ......................104
Auxiliary heating ............................... 104
Heater booster function ................. 107
malfunction .................................... 216
Switch ............................................ 105
Switch-on time ............................... 106 B
Backup lamp Changing bulbs ...................... 236, 237
BAS (Brake Assist System)
.................48
Battery ............................................... 175
Charge indicator lamp ...................191
Charging ........................................ 178
Disconnecting ................................ 176
Display message ............................ 205
Isolating switch ................................ 874
Index
Function Page
0067
ESP
®
warning lamp 50,
187 ASR warning lamp 48,
187 0041
Coolant level too low 193
00AE
Coolant temperature too
high
193
008A
Restraint systems
malfunction
191
0065
Brake fluid level too low 188
EBD malfunction 187
Trailer brake force booster
malfunction
188
00B4
Engine oil level warning 192
00BB
Engine diagnostics
indicator lamp
194
Exhaust gas aftertreatment
malfunction
195
0028
Preglow system 194
004A
Left-hand turn signal 90
0077
Tire pressure loss or the tire
pressure monitor is
malfunctioning (USA only)
195
Tire pressure loss (Canada
only)
195
00BD
Fluid level too low in
windshield washer/
headlamp cleaning system
196
003E
Door open 197
0026
Brake pads/linings worn 191
004D
Right-hand turn signal 90
0031
ABS malfunction 189
003D
ASR malfunction 189
BAS malfunction 189
009E
ESP
®
malfunction 187 Function Page
00E4
DEF supply low or
contaminated/thinned
199
Exhaust gas aftertreatment
malfunction
200
00AB
Dirt accumulation in air
filter
195
00B6
Reserve fuel 193
Fuel filler cap open 194
00BA
Water in the fuel 196
003F
Battery charging
malfunction
191
0055
Bulb defective 197
0066
Parking brake applied 112
0064
Low-beam headlamps on 89
004E
Working speed governor
(ADR) on
117
0063
High-beam headlamps on 90
0080
Reserve fuel 193
Fuel filler cap open 194
0082
Fasten seat belt 196
i
Vehicles with steering-wheel buttons:
Corresponding messages may also be
shown in display 0073(Y page 24). Instrument cluster variants
25At a glance
status and the position of the key in the
ignition lock. The mobile phone display
indicates the charging status. Communications
135Controls Z
X
Loosen the bolts holding retainer 008A, which
prevents the battery from moving around. X
Pull retainer 008A upwards and slide the
battery out of
its anchorage in the direction
of travel.
X Fold the bar upwards and remove the
battery from the battery case.
Additional battery in the engine
compartment
X Disconnect the battery ( Y page 177).
X Loosen the bolts holding the retainer that
prevents the battery from moving around.
X Remove the battery holder and take out the
battery.
Charging the battery G
Warning
Only charge the battery in a well-ventilated
area. As the battery is being charged, gases
can escape and generate minor explosions,
which can injure
you and others or may cause damage to the paintwork or acid corrosion on
the vehicle.
There is a risk of acid burns during the
charging process due to the gases which
escape from the battery. Do not, therefore,
lean over the battery while it is being
recharged.
X Recharge the removed battery. Observe
the notes in the operating instructions for
your battery charger.
X Follow the above steps in the reverse order
to install the battery again.
! Only charge the installed battery with a
battery charger that has been tested and
approved by the distributor named on the
inside front cover. This device allows the
battery to be
charged when it is installed in
the vehicle. The vehicle's electronics
system may otherwise be damaged.
i It is also possible to charge the starter
battery using the jump-starting connection
point in the engine compartment
(Y page 247).
Reconnecting the battery !
Always connect the battery in the order
described below. Never
mix up the terminal
clamp disconnection/connection order
and never mix up the terminal clamps. You
may otherwise damage the vehicle
electronics.
X Switch off all electrical consumers.
X Connect the positive terminal clamp.
X Attach the cover to the positive terminal.
X Connect the negative terminal clamp.
i After the battery has been reconnected,
you must reset the side windows
(Y page 61). 178
Maintenance
Operation
Battery care
!
Please always observe the following
notes:
R dirty battery clamps
and battery surfaces
cause leak currents, which lead to the
batteries discharging. Always keep the
battery terminals and battery surfaces
clean and dry. Grease the battery
terminals, particularly the terminal
undersides, with a light coating of acid-
resistant grease.
R cleaning agents containing fuel corrode
the battery housing. Only clean the
battery housing with commercially
available cleaning agents.
R only clean the batteries when the caps
are screwed on. Dirt may otherwise enter
the battery cells and damage the battery.
R the breathers in the caps and the cell
ventilation tubes must be open.
Otherwise, gas cannot escape. Unscrew
blocked breathers and clean them with a
suitable tool such as a piece of wire. If
you do not unscrew the caps for cleaning,
there is a risk of short circuit.
R regularly check the battery terminals and
the fastening of the negative cable to the
chassis to ensure that they are firmly
seated.
R if batteries are not being used, you
should charge them once a month. Maintenance
179
Operation Z
Display messages Possible causes/consequences and
0050 SolutionsABS
Unavailable
G
Warning!
ABS has been deactivated due to undervoltage. The battery might
not be charging.
The brake system
is still available with the normal braking effect.
X Drive on carefully.
X Visit a qualified specialist workshop immediately. Check Diesel
Exhaust Fluid see
Operator's Manual The Diesel Exhaust Fluid (DEF) supply has dropped below
1.5 US gal (5.5 l).
After the message appears for the first time and under normal
driving conditions, the remaining DEF supply will last for
approximately 1000 miles (1600 km).
After
that, the 0.8 US gal (3.0 l) reserve mark is reached. A warning
tone sequence sounds. The engine can then only be started
another sixteen times.
X add DEF supply ( Y page 143).
After topping up, the system check takes approximately
20 seconds. The display message then disappears. Check Diesel
Exhaust Fluid see
Operator's Manual If the yellow
00BB engine diagnosis indicator lamp lights up in
addition, the DEF reducing agent is contaminated, diluted or not
compliant with ISO 22241.
After the message appears for the first time, and under normal
driving conditions, you can continue driving for approximately
50 miles
(80 km). After this, a warning tone sequence sounds. The
engine can then only be started another sixteen times.
Have the DEF tank cleaned and refilled at a qualified specialist
workshop as soon as possible. ESP
Visit workshop
G
Warning!
ESP ®
has been deactivated due to a malfunction. This also
deactivates cruise control.
The vehicle's stability is no longer automatically regulated at an
early stage. Engine power output may be reduced.
X Drive on carefully.
X Visit a qualified specialist workshop immediately.202
Troubleshooting
Practical advice
Display messages Possible causes/consequences and
0050 SolutionsESP
Unavailable
ESP
®
has been deactivated due to undervoltage. This also
deactivates cruise control.
The battery might not be charging.
The vehicle's stability is no longer automatically regulated at an
early stage. Engine power output may be reduced.
X Drive on carefully.
X Visit a qualified specialist workshop as soon as possible. Tire pres.
Adj. pres. The pressure in one or more tires is too low or there is a significant
difference between tire pressures on individual wheels.
X
Check the tire pressure at the next opportunity and correct it if
necessary ( Y page 281). Tire pres.
monitor
inoperative The tire pressure monitor has malfunctioned.
X
Have the tire pressure monitor and the wheels checked at a
qualified specialist workshop. Tire press.
monitor currently
unavail. The tire pressure monitor function is temporarily unavailable due
to radio interference or undervoltage.
X
As soon as the causes have been remedied, the tire pressure
monitor activates itself automatically. Tire press.
monitor
inoperative No
wheel sensors The tire pressure monitor is not receiving signals from one or more
wheels because:
R
a wheel has
been replaced with the spare wheel without wheel
electronics.
R the maximum temperature on one of the wheel electronics units
has been exceeded.
R the wheel electronics are malfunctioning.
X Have wheels with suitable wheel electronics units installed at a
qualified specialist workshop. Cruise control
Visit workshop Cruise control has been deactivated due to a malfunction.
X
Have cruise control checked at a qualified specialist workshop. SRS
Restraint system
Visit workshop
G
Warning!
The restraint systems have malfunctioned. The air bags or belt
tensioners could be triggered unintentionally or might not be
triggered at all in the event of an accident.
X Drive on carefully.
X Visit a qualified specialist workshop as soon as possible. Troubleshooting
203
Practical advice Z
Display messages Possible causes/consequences and
0050 Solutions003D
Visit workshop G
Warning!
BAS has been deactivated due to a malfunction.
The brake system continues to function normally, but without
electronic support.
X Drive on carefully.
X Visit a qualified specialist workshop immediately. 003D
Unavailable ASR and BAS have been deactivated due to undervoltage.
The battery might not be charging.
The brake system
is still available with the normal braking effect.
X Drive on carefully.
X Visit a qualified specialist workshop immediately. 003F
Battery/
Alternator Visit
workshop The battery is not being charged. This could be caused by a
defective alternator or a torn poly-V-belt.
X
Pull over immediately, paying attention to road and traffic
conditions.
X Check the poly-V-belt.
If it is torn: do not drive any further. Consult the nearest
qualified specialist workshop.
If it is undamaged: have the vehicle checked as soon as
possible at a qualified specialist workshop. 0026
Brake wear Visit
workshop G
Warning!
The brake pads/linings have reached their wear limit.
X Have the brake pads/linings replaced as soon as possible at a
qualified specialist workshop. 0065
Brake fluid Visit
workshop G
Warning!
There is insufficient brake fluid in the brake fluid reservoir.
X Pull over immediately, paying attention to road and traffic
conditions.
X Check the brake fluid level in the supply reservoir
(Y page 170).
X If the brake fluid level is below the MIN mark: do not drive any
further.
X Do not add brake fluid. This will not rectify the problem.
X Consult a qualified specialist workshop. Troubleshooting
205
Practical advice Z