Page 440 of 498

439 Practical hints
Towing the vehicle
Installing towing eye bolt
Front of vehicle
1Cover on right side of front bumper
To remove cover:
Press mark on cover in direction of ar-
row.
Lift cover off to reveal the threaded 
hole for towing eye bolt.
!When towing the vehicle with all wheels 
on the ground, please note the follow-
ing:
With the automatic central locking acti-
vated and the SmartKey in starter 
switch position2, or KEYLESS-GO* 
start/stop button in position2, the ve-
hicle doors lock if the left front wheel 
as well as the right rear wheel are turn-
ing at vehicle speeds of approximately 
9 mph (15 km/h) or more.
Switch off the tow-away alarm (if 
equipped) (
page 95).
To prevent the vehicle door locks from 
locking, deactivate the automatic cen-
tral locking (page 122).
Towing of the vehicle should only be 
done using the properly installed tow-
ing eye bolt. Never attach tow cable, 
tow rope or tow rod to the vehicle chas-
sis, frame or suspension parts.
iThe selector lever will remain locked in 
positionP and the SmartKey will not 
turn in the starter switch if the battery 
is disconnected or discharged. For 
more information see “Battery” 
(page 431) or “Jump starting” 
(page 435).
Manual unlocking of the transmission 
selector lever (
page 404).
 
     
        
        Page 462 of 498
461 Technical data
Fuels, coolants, lubricants etc.
Fuels, coolants, lubricants etc.
CapacitiesVehicle components and their respective 
lubricants must match. Therefore only use 
products tested and approved by 
Mercedes-Benz.Please refer to the Factory Approved Ser-
vice Products Pamphlet, or inquire at your 
authorized Mercedes-Benz Center.
Model
Capacity
Fuels, coolants, lubricants etc.
Engine with oil filter
CLS 500
8.0 US qt (7.5 l)
Approved engine oils
CLS 55 AMG
9.0 US qt (8.5 l)
Automatic transmission
CLS 500
8.5 US qt (8.0 l)
MB Automatic Transmission Fluid
CLS 55 AMG
8.67 US qt (8.2 l)
Rear axle
1.37 US qt (1.3 l)
Hypoid gear oil SAE 85 W 90 
     
        
        Page 475 of 498

474 Technical termsFSS PLUS (Canada vehicles)
(F
lexible S
ervice S
ystem PLUS)
Maintenance service indicator in the 
multifunction display that informs the 
driver when the next vehicle mainte-
nance service is due. FSS evaluates 
engine temperature, oil level, vehicle 
speed, engine speed, distance driven 
and the time elapsed since your last 
service, calculates other maintenance 
service work required, and calls for the 
next maintenance service accordingly. 
GAWR
(G
ross A
xle W
eight R
ating)
(
page 332)
Gear range
Number of gears which are available to 
the automatic transmission for shifting. 
The automatic gear shifting process 
can be adapted to specific operating 
conditions using the selector lever.GPS
(G
lobal P
ositioning S
ystem)
Satellite-based system for relaying 
geographic location information to and 
from vehicles equipped with special 
receivers. Employs DVD digital maps 
for navigation.
GVW
(G
ross V
ehicle W
eight)
(
page 332)
GVWR
(Gross V
ehicle W
eight R
ating)
(
page 333)
Instrument cluster
The displays and indicator/warning 
lamps in the driver’s field of vision, in-
cluding the tachometer, speedometer 
and fuel gauge.KEYLESS-GO*
System for entering and operating the 
vehicle without the use of a SmartKey.
Kickdown
Depressing the accelerator past the 
point of resistance shifts the transmis-
sion down to the lowest possible gear. 
This very quickly accelerates the vehi-
cle and should not be used for normal 
acceleration needs.
Kilopascal (kPa)
(
page 333)
Locking knob
Knob on the door which indicates 
whether the door is locked or un-
locked. Pushing the locking knob down 
on an individual door from inside will 
lock that door. 
     
        
        Page 477 of 498

476 Technical termsPower train
Collective term designating all compo-
nents used to generate and transmit 
motive power to the drive axles, includ-
ing:
Engine
Clutch/torque converter
Transmission
Transfer case*
Drive shaft
Axle shafts/axles
Production options weight
(
page 333)Program mode selector switch
Used to switch the automatic transmis-
sion between standard operationS and 
operationC.
CLS 55 AMG with steering wheel gear-
shift control and manual shift program: 
in addition to S and C (for sporty S or 
comfortable C operation), you can use 
M for manual shift program.
PSI
(P
ounds per s
quare i
nch)
(
page 333)
Recommended tire inflation pressure
(page 333)
Restraint systems
Seat belts, belt tensioners, air bags and 
child restraint systems. As indepen-
dent systems, their protective func-
tions complement one another.Rim
(
page 333)
RON
(Research O
ctane N
umber)
The Research Octane Number for gaso-
line as determined by a standardized 
method. It is an indication of a gaso-
line's ability to resist undesired detona-
tion (knocking). The average of both 
the ->MON (Motor Octane Number) 
and RON (Research Octane Number) is 
posted at the pump, also known as 
ANTI-KNOCK INDEX.
Electro-hydraulic brake system 
Electronically controlled hydraulic 
braking system for increased braking 
safety and comfort.
Sidewall
(
page 333) 
     
        
        Page 478 of 498

477 Technical terms
Shift lock
When the vehicle is parked, this lock 
prevents the transmission selector le-
ver from being moved out of positionP 
without the ignition or engine on and 
brake pedal depressed.
SRS
(S
upplemental R
estraint S
ystem)
Seat belts, emergency tensioning de-
vice and air bags. Though independent 
systems, they are closely interfaced to 
provide effective occupant protection.Tele Aid System
(T
elematic A
larm I
dentification on D
e-
mand)
The Tele Aid system consists of three 
types of response: automatic and man-
ual emergency, roadside assistance 
and information. Tele Aid is initially 
activated by completing a subscriber 
agreement and placing an acquain-
tance call.
The Tele Aid system is operational 
provided that the vehicle’s battery is 
charged, properly connected, not dam-
aged and cellular and GPS coverage is 
available.
Telematics*
A combination of the terms “telecom-
munications” and “informatics”.Tightening torque
Force times lever arm (e.g. a lug 
wrench) with which threaded fasteners 
such as wheel bolts are tightened.
TIN
(T
ire I
dentification N
umber)
(
page 334)
Tire load rating
(page 334)
Tire ply composition and material used
(page 334)
Tire speed rating
(page 334)
Traction
(page 334)
Tread
(page 334) 
     
        
        Page 481 of 498

480 IndexAutomatic transmission 176
Accelerator position 180
Emergency operation 
(Limp-Home Mode) 190
Gear ranges 181
Gear selector lever position 178
Gear shifting malfunctions 190
Kickdown 180
Kickdown, manual shift program 
(CLS 55 AMG) 190
Manual shift program mode 
(CLS 55 AMG) 188
Manual shifting 183
One-touch gearshifting 183
Program mode selector switch 182
Selector lever position 176
Starting the engine 49
Winter program mode 182B
BabySmart
TM
Airbag deactivation system 78
Compatible child seats 471
Self-test 79
BabySmart
TM air bag deactivation 
system 471
Backrest
Seat, multicontour* 126
Seat, power 40
Backup lamps
Messages in display 387
Bar 332
BAS 86, 472
Batteries, SmartKey
Changing 408
Checking battery condition 102
Batteries, SmartKey with KEYLESS-GO*
Checking 109
Battery
Jump starting 435Battery, vehicle 431
Charging 433
Disconnecting 432
Messages in display 369, 373
Reconnecting 434
Removing 433
Bead 332
Bi-Xenon headlamps* 472
Block heater* (Canada only) 337
Brake assist system (BAS) 472
Brake fluid 291
Messages in display 377
Brake lamp
Messages in display 387
Brake pads
Message in display 374
Brakes
Warning lamp 354
Break-in period 278
Bulbs, replacing see Replacing bulbs 
     
        
        Page 486 of 498

485 Index
Front seats
Heating* 128
FSS (Canada vehicles) 339
FSS (Flexible Service System) 474
Fuel 291
Fuel reserve warning lamp 358
Premium unleaded gasoline 291
Fuel consumption statistics
After start 171
Since last reset 171
Fuel filler flap 290
Locking 290
Opening 290
Unlocking 290
Fuel requirements 466
Fuel tank
Filler flap 290
Fuels, coolants, lubricants etc. 461
Fuse box in trunk 442
Fuses 441
Fuse chart 441
Fuse extractor 441
Replacing 441
Spare fuses 441G
Garage door opener* 270
Gasoline see Fuel 291
GAWR 332
Gear range 474
Automatic transmission 181
Limiting 181
Shifting into optimal 183
Gear selector lever
Cleaning 349
Position 178
Global
Locking 101
Locking with KEYLESS-GO* 107
Unlocking 100
Unlocking with KEYLESS-GO* 107
Global Positioning System (GPS) 474
Glove box 251
Good visibility 191
GPS 474
Gross Axle Weight Rating see GAWR
Gross Vehicle Weight Rating see GVWR
Gross Vehicle Weight see GVW
GVW 332
GVWR 333H
Hands-free microphone 29
Hard plastic trim items, cleaning 349
Hazard warning flasher 140
Head restraint
Active head restraint 74, 124
Head restraints
resetting activated 407
Headlamps
Automatic headlamp mode 135
Bi-Xenon* 472
Cleaning lenses 346
Cleaning system* 191
Deactivating 59
Headliner, cleaning 350
Heated seats* 128
Height adjustment
Head restraints 41
Steering wheel 41
Vehicle level 239
High beam flasher 53, 138
High beam headlamps
Replacing bulbs 415
Switching on 53, 138
High mounted brake lamp 412 
     
        
        Page 491 of 498

490 IndexParktronic* 475
Cleaning system sensors 347
Malfunctioning 245
Warning sounds 245
Parts service 444
Passenger compartment
Interior lighting 141
Interior rear view mirror 44
Main fuse box 442
Parcel net in the front passenger 
footwell 254
Passenger safety see occupant safety 64
Pedals 279
Phone number*
Redialing 175
Plastic parts, cleaning 349
Poly-V-belt drive 475
Layout 447
Positions (Memory function*)
Recalling from memory 132
Storing into memory 132
Potential problems associated with 
underinflated and overinflated 
tires 321
Power assistance 280
Power outlet 259Power seat
Adjusting backrest tilt 40
Adjusting head restraint height 41
Adjusting head restraint tilt 41
Adjusting seat cushion tilt 40
Adjusting seat height 40
Memory function 131
Seat fore and aft adjustment 40
Power tilt/sliding sunroof 219
Messages in display 392
Opening/closing 219
Opening/closing in an 
emergency 406
Stopping 220
Synchronizing 221
Power train 476
Power washer 343
Power windows 214
Automatic opening/automatic 
closing 216
Cleaning 347
Operating 214
Rear door window, Blocking 
operation 82
Side windows 214
Synchronizing 216Practical hints 352
Problems
While driving 56
With vehicle 17
Product information 9
Production options weight 333
Program mode selector switch 476
Automatic transmission 182
PSI 333
PULSE function (Massage function) 128
Push-start see Tow-start
R
Radio
Selecting satellite radio stations* 
(USA only) 154
Selecting stations 153
Radio transmitters 287
Range (distance to empty) 172
Rear door window
Blocking operation 82
Rear fog lamp
Switching on 138
Rear lamp 412
Rear lamps see Tail lamps