belt MERCEDES-BENZ C350S 2008 W204 Service Manual

399 Practical hints
What to do if …?
Display Possible cause/consequencePossible solution
#The battery is no longer charging.
Possible causes:

alternator malfunctioning

broken poly-V-belt
Stop the vehicle immediately in a safe loca-
tion and check the poly-V-belt.
If it is broken:
Do not continue to drive. Otherwise the en-
gine will overheat due to an inoperative water
pump which may result in damage to the en-
gine.
Notify an authorized Mercedes-Benz Center.
If it is intact:
Drive immediately to the nearest authorized
Mercedes-Benz Center.
There is a malfunction in the electronic sys-
tem.Have the system checked at an authorized
Mercedes-Benz Center as soon as possible.
2Check
Brake Pad WearThe brake pads have reached their wear
limit.Have the brake pads replaced as soon as
possible.
!Brake pad thickness must be visually
checked by a qualified technician at the intervals
specified in the Maintenance Booklet.

403 Practical hints
What to do if …?
Display Possible cause/consequencePossible solution
•Coolant Low
Stop Vehicle!
Turn Engine OffThe poly-V-belt could be broken.Stop the vehicle in a safe location or as soon
a s it is sa fe t o do so and im media tely turn off
the engine.
Check the poly-V-belt.
If it is broken:
Do not continue to drive. Otherwise the en-
gine will overheat due to an inoperative water
pump which may result in damage to the en-
gine.
Notify an authorized Mercedes-Benz Center.
If it is intact:
Do not continue to drive the vehicle with this
message displayed. Doing so could result in
serious engine damage that is not covered by
the Mercedes-Benz Limited Warranty.
Observe the coolant temperature gauge in
the instrument cluster (
page 26).
(Continued on next page)

459 Technical data
Parts service
Warranty coverage
Identification labels
Layout of poly-V-belt drive
Engine
Rims and tires
Electrical system
Main dimensions and weights
Fuels, coolants, lubricants, etc.

464 Technical data
Layout of poly-V-belt drive
C 300/C 350
1Idler pulley
2Idler pulley
3Automatic belt tensioner
4Power steering pump
5Air conditioning compressor
6Crankshaft
7Coolant pump
8Generator (alternator)

465 Technical data
Engine
Engine
ModelC 230 (204.052)1,2
C 230 Sport (204.052)1
C 230 4MATIC (204.085)1,2
C 230 4MATIC Sport (204.085)1,2
1The quoted data apply only to the standard vehicle. See an authorized Mercedes-Benz Center for the corresponding data of all special bodies and special equipment.2Canada only.
C 300 (204.054)1
C 300 Sport (204.054)1
C 300 4MATIC (204.081)1
C 300 4MATIC Sport (204.081)1
Engine272272
Mode of operation4-stroke engine, gasoline injection4-stroke engine, gasoline injection
No. of cylinders66
Bore3.46 in (88.00 mm)3.46 in (88.00 mm)
Stroke2.69 in (68.40 mm)3.23 in (82.10 mm)
Total piston displacement152.3 cu in (2496 cm3)182.8 cu in (2996 cm3)
Compression ratio11.4:111.3:1
Output acc. to SAE J 13493
3Premium fuel required. Performance may vary with fuel octane rating.
201 hp/6 100 rpm
(150 kW/6 100 rpm)228 hp/6 000 rpm
(170 kW/6 000 rpm)
Maximum torque
acc. to SAE J 1349181 lb-ft/2 900 - 5 500 rpm
(245 Nm/2 900 - 5 500 rpm)221 lb-ft/2 500 - 5 000 rpm
(300 Nm/2 500 - 5 000 rpm)
Maximum engine speed6500 rpm6500 rpm
Firing order1-4-3-6-2-51-4-3-6-2-5
Poly-V-belt2404 mm2404 mm

466 Technical data
Engine
ModelC 350 (204.056)1,2
C 350 Sport (204.056)1
C 350 4MATIC (204.087)1,2
C 350 4MATIC Sport (204.087)1,2
1The quoted data apply only to the standard vehicle. See an authorized Mercedes-Benz Center for the
corresponding data of all special bodies and special equipment.
2Canada only.
Engine272
Mode of operation4-stroke engine, gasoline injection
No. of cylinders6
Bore3.66 in (92.90 mm)
Stroke3.39 in (86.00 mm)
Total piston displacement213.5 cu in (3498 cm3)
Compression ratio10.7:1
Output acc. to SAE J 13493
3Premium fuel required. Performance may vary with fuel octane rating.
268 hp/6 000 rpm
(200 kW/6 000 rpm)
Maximum torque
acc. to SAE J 1349258 lb-ft/2 400 - 5 000 rpm
(350 Nm/2 400 - 5 000 rpm)
Maximum engine speed6 500 rpm
Firing order1-4-3-6-2-5
Poly-V-belt2 404 mm

492 Index
Dual-zone automatic climate control
Maximum cooling MAX COOL 256
Dual-zone automatic climate control see
Climate control system
E
Easy-entry/exit feature*
(Canada only) 95, 174
EBP 61
Electrical fuses see Fuses
Electrical outlet
Glove box 293
Rear passenger compartment 293
Electrical system, Technical Data 473
Electronic Brake Proportioning see EBP
Electronic Stability Program see ESP
®
Electronic traction system 63
Emergency call system 295
Emergency calls, Tele Aid* 296
Emergency operation (Limp-Home
Mode) 146Emergency operations
Gear selector lever*, Unlocking 426
Locking the vehicle 424
Releasing from inside 271
Remote door lock* 302
Remote door unlock* 301
Unlocking the trunk 425
Unlocking the vehicle 424
Emergency tensioning device see ETD
Emergency, In case of
Battery, Jump starting 451
First aid kit 420
Flat tire 440
Fuses 456
Instrument cluster, Indicator
lamps 374–383
Roadside Assistance 12
Roadside Assistance* (Tele
Aid*) 299
Towing the vehicle 453
Emission control 320
Emission control information label 463
Emission control system warranties 10Engine
Adding engine oil 328
Belt layout 464
Cleaning 366
Compartment 325
Coolant 329, 478, 484
Malfunction indicator lamp 27, 378
Number 462, 463
Oil 327, 476, 480
Residual heat and ventilation 266
Starting 127
Technical data 465
Turning off 134
Engine coolant see Coolant
Engine oil 327
Adding 328
Additives 480
Checking level (Dipstick) 327
Consumption 327
Dipstick 327
Filler neck 327, 328
Recommended engine oils and oil
filters 476

497 Index
L
Labels 462
Certification 462
Emission control information 463
Tire and Loading Information 335
Lamps, exterior 431
Light sensor 409
Lamps, indicator and warning
ABS 27, 59, 374
Air bag Off 40
Battery check lamp (SmartKey with
KEYLESS-GO* 77
Battery check lamp (SmartKey) 72
Brake warning lamp 27
Brakes 376
Engine diagnostics 27, 378
Engine malfunction 27, 378
ESP
®27, 376, 379, 380
Front passenger front air bag off 29,
45, 385, 386
Fuel reserve 380
High beam headlamps 27
Instrument cluster 374–383
Maintenance service indicator 362
Seat belt telltale 27, 380
SRS 27, 382Turn signals 27
Language 193
Language, Setting 168
LATCH-type child seat anchors see
Children in the vehicle
Lever
For cruise control 242
License plate lamps
Messages in display 411
Replacing bulbs 431, 437
Light alloy wheels, Cleaning 370
Light sensor
Message in display 409
Lighter see Cigarette lighter
Lighting 108
Automatic headlamp mode 109
Corner-illuminating front fog
lamps* 112
Daytime running lamp mode 110
Door entry lamps 116
High beam flasher 112
Instrument cluster illumination 148
Interior 114
Manual headlamp mode 108
Trunk 116
Limp-home mode 146Loading see Vehicle loading
Locator lighting 172
Lock button
Door handle (KEYLESS-GO*, Canada
only) 76, 125
Key, SmartKey 70
Key, SmartKey with KEYLESS-GO*
(Canada only) 73
Locking 133
Vehicle in an emergency 425
Locking knob 79
Loss of
Key, Mechanical 79
Key, SmartKey 79
Key, SmartKey with KEYLESS-GO*
(Canada only) 79
Service and Warranty Information
Booklet 461
Low beam headlamps
Replacing bulbs (Bi-Xenon*) 431
Replacing bulbs (Halogen) 431, 433
Lowering
Vehicle 445
Lubricants 476
Lumbar support* 91

499 Index
Restraint systems 416
Run Flat Indicator 390
Side marker lamps 412
SRS 416
Tele Aid* 418
TPMS* (Tire Pressure Monitoring Sys-
tem), (USA only) 392, 418
Trunk 419
Turn signals 413
Windshield washer fluid 419
Multifunction steering wheel 28, 152
Button operation 152
N
Navigation system* 158
See separate COMAND* operating
instructions
Neutral gear position,
Automatic transmission* 138, 140
Neutral gear position,
Manual transmission 137
New vehicle break-in 310
Normal occupant weight 357
Number, Vehicle Identification (VIN) 463O
Occupant Classification System see OCS
Occupant distribution 357
Occupant safety 34
Air bags 36
Children and air bags 51
Children in the vehicle 51
Fastening the seat belt 105
Front passenger front air bag off indica-
tor lamp 45
Infant and child restraint systems 51
LATCH-type child seat anchors 55
Seat belts 38, 105
OCS 41
Self-test 45
Oil
Filler neck 328
One-touch gearshifting
Gear selector lever* 145
Operating safety 15
Operating safety (Audio system) 177
Ornamental moldings, Cleaning 367
Outside temperature indicator 27, 149
Outside temperature see Displays
Overhead control panel 31
Override switch 57P
Paintwork, Cleaning 365
Panic alarm
Audible alarm and flashing exterior
lamps 58
Panic button 58
Panorama roof with power tilt/sliding
panel* 276
Cleaning 369
Opening/closing 277
Synchronizing 278
Parcel net in front passenger
footwell 285
Parking 133, 314
Parking brake 129, 134
Message in display 401
Parking lamps
Messages in display 411
Replacing bulbs 431, 434, 436
Parking position* (Canada only)
Exterior rear view mirrors 101
Parts service 460
PASS AIR BAG OFF indicator lamp see
Front passenger front air bag off indica-
tor lamp

500 Index
Passenger compartment 318
Electrical outlet, glove box 293
Electrical outlet, rear seat
ashtray 293
Passenger safety see Occupant safety
Pedals 311
Performance
Cold weather 483
Hot weather 483
Phone* see Telephone*
Plastic parts, cleaning 370
Poly-V-belt drive 464
Layout 464
Potential problems associated with under-
inflated and overinflated tires 347
Power assistance 311
Power folding exterior rear view
mirrors* 98
Power tilt/sliding sunroof 273
Opening/closing 273
Synchronizing 275
Power washer 365
Power windows 120
Blocking of rear window operation 57
Cleaning 368
Opening/closing 120Practical hints 420
Premium unleaded gasoline 478, 481
Problems
While driving 132
With vehicle 16
Product information 9
Production options weight 357
Program mode 151
Program mode see Automatic transmis-
sion*, Automatic shift program
Program mode selector switch*
Automatic shift program 144
Proper use of the vehicle 15
PSI 358
Push-start see Tow-start
R
Radio
Operation 188, 189, 192, 193, 194,
222
Satellite radio*, operation 200
Selecting stations
(Control system) 159
Radio transmitters, control and
operation 319
Range (distance to empty) 157
Reading lamps in the front 115, 116Reading lamps in the rear 116
Rear bench seat, foldable* 281
Rear climate control 268
Rear door window
Blocking operation 57
Rear fog lamp see Fog lamps
Rear lamps see Tail lamps
Rear seat ashtray see Ashtray
Rear seats
Adjustment 85
Head restraints 89
Rear view mirrors see Mirrors
Rear window defroster 256, 265
Recommended inflation pressure 358
Recovery services, Stolen vehicle
(Tele Aid*) 302
Refrigerant, Air conditioning 478, 480
Refueling 322
Regular checks 324
Remote
Door lock with Tele Aid* 302
Door unlock with Tele Aid* 301
Trunk opening/closing* switch 269
Remote control, SmartKey 70
Remote control, SmartKey with
KEYLESS-GO* (Canada only) 73