Page 361 of 474
360 Practical hintsWhat to do if …Text messagesDisplay message
Possible cause/consequence
Possible solution
ABS
malfunction
Visit workshop
The ABS has detected a malfunction and 
has switched off. The ESP
®, BAS and the 
Run Flat Indicator* are also deactivated.
The brake system is still functioning 
normally but without the systems specified 
above.
Continue driving with added caution. 
Wheels may lock during hard braking, 
reducing steering capability.
Have the system checked at an 
authorized Mercedes-Benz Center as 
soon as possible.
Failure to follow these instructions increases 
the risk of an accident.
Display malfunction
Visit workshop
The ABS or the ABS display is 
malfunctioning.
Continue driving with added caution. 
Wheels may lock during hard braking, 
reducing steering capability.
Have the system checked at an 
authorized Mercedes-Benz Center as 
soon as possible.
Failure to follow these instructions increases 
the risk of an accident. 
         
        
        
     
        
        Page 362 of 474

361 Practical hints
What to do if …
Display message
Possible cause/consequence
Possible solution
ESP
unavailable
See Operator’s Manual
The ESP
® was deactivated because of a 
malfunction or interrupted power supply. The 
BAS and the Run Flat Indicator* are also deac-
tivated.
The ABS might not be operational.
The brake system is still functioning normally 
but without the systems specified above.
Continue driving with added caution.
Visit an authorized Mercedes-Benz 
Center as soon as possible.
Failure to follow these instructions 
increases the risk of an accident.
If the yellow ESP
® warning lampv flashes 
while driving and this message appears, the 
electronic traction system has switched off to 
prevent overheating of the drive wheel brakes.
As soon as the brakes have cooled off, the 
electronic traction system switches on 
again.
The self-diagnosis has not been completed 
yet.
The ESP
®, BAS and the Run Flat Indicator* are 
temporarily deactivated.
The brake system is still functioning normally 
but without the systems specified above.
The display will clear after driving a short 
distance at more than 12 mph (20 km/h). 
         
        
        
     
        
        Page 363 of 474

362 Practical hintsWhat to do if …Display message
Possible cause/consequence
Possible solution
ESP
unavailable
See Operator’s Manual
The charging voltage has fallen below 
10 volts. The battery might not be charged 
sufficiently.
The ESP
®, BAS and the Run Flat Indicator* are 
deactivated.
The brake system is still functioning normally 
but without the systems specified above.
Continue driving with added caution.
If necessary, have the generator and 
battery checked.
When the voltage is above this value again, 
the ESP
® is operational again.
ESP
malfunction
Visit workshop
The ESP
® is deactivated because of a 
malfunction.
The ESP®, BAS and the Run Flat Indicator* are 
deactivated.
The brake system is still functioning normally 
but without the systems specified above.
Continue driving with added caution.
Visit an authorized Mercedes-Benz 
Center as soon as possible.
Failure to follow these instructions 
increases the risk of an accident.
Display malfunction
Visit workshop
The ESP
® or the ESP
® display is 
malfunctioning.
Continue driving with added caution.
Visit an authorized Mercedes-Benz 
Center as soon as possible.
Failure to follow these instructions 
increases the risk of an accident. 
         
        
        
     
        
        Page 369 of 474

368 Practical hintsWhat to do if …Display message
Possible cause/consequence
Possible solution
Run Flat Indicator
inactive
 
The Run Flat Indicator* is malfunc-
tioning.
Have the Run Flat Indicator* checked by an 
authorized Mercedes-Benz Center.
Check tires
Then reactivate
Run Flat Indicator
 
There was a warning message about 
a loss in tire inflation pressure and 
the Run Flat Indicator* has not been 
reactivated yet.
Make sure that the correct tire inflation pressure 
is set for each tire.
Then reactivate the Run Flat Indicator*.
Run Flat Indicator
unavailable
 
The Run Flat Indicator* has been 
switched off due to an error.
Have the Run Flat Indicator* checked by an 
authorized Mercedes-Benz Center.
Tire pressure
Check tires
 
The Run Flat Indicator* indicates 
that the pressure is too low in one or 
more tires.
Carefully bring the vehicle to a halt, avoiding 
abrupt steering and braking maneuvers. Observe 
the traffic situation around you.
Check and adjust the tire inflation pressure as 
required (
page 316). 
If necessary, change the wheel (
page 406).
Reactivate the Run Flat Indicator* after adjusting 
the tire inflation pressure values (
page 318).
Warning!
G
Do not drive with a flat tire. A flat tire affects 
the ability to steer or brake the vehicle.
You may lose control of the vehicle. Contin-
ued driving with a flat tire will cause exces-
sive heat build-up and possibly a fire. 
         
        
        
     
        
        Page 412 of 474

411 Practical hints
Flat tire
MOExtended system*
The MOExtended system allows you to 
continue driving your vehicle even if there 
is a total loss of pressure in one or more 
tires. 
You may only use the MOExtended system 
in conjunction with the Run Flat Indicator*.
!The maximum distance in emergency 
mode depends on the vehicle’s load. It 
is 30 miles (50 km) if the vehicle is par-
tially loaded and 18 miles (30 km) if the 
vehicle is fully loaded. 
The point at which the maximum driv-
ing distance begins in emergency 
mode is when the warning message 
appears in the multifunction display 
indicating that there is a loss of tire 
inflation pressure. 
Do not exceed the maximum speed of 
50 mph (80 km/h). 
Warning!
G
In emergency mode, your vehicle’s driving 
characteristics are diminished in such situa-
tions as:
driving around curves
while braking
while accelerating rapidly
Therefore, your driving style must be adapt-
ed accordingly. Avoid abrupt steering and 
driving maneuvers, as well as driving over 
obstacles (road curbs, potholes, or off-road 
areas). This is especially important if the ve-
hicle is heavily loaded.
The emergency driving distance that can be 
achieved greatly depends on the demands 
placed on the vehicle. Depending on speed, 
load, driving maneuvers, road conditions, 
outside temperature, etc., the distance can 
be significantly shorter or, if the vehicle is 
driven cautiously, somewhat longer.
Do not continue driving in emergency mode 
if
you notice knocking sounds
the vehicle starts to shake
smoke develops and you smell rubber
ESP
® is intervening continuously
you notice tears on the tire sidewalls
After driving in emergency mode, you must 
have the rims inspected by an authorized 
Mercedes-Benz Center to check if they are 
suitable for further use. The failed tire must 
be replaced in any case.iWhen replacing individual or all tires on 
the vehicle, make sure only matching 
tires marked with “MOExtended” are 
mounted in the size specified for your 
vehicle (
page 432). 
         
        
        
     
        
        Page 435 of 474
434 Technical dataRims and TiresSame size tiresModel
C230
1
C280
C2804MATIC
C350
C3504MATIC
1Canada only
C230 Sport
C350 Sport
Rims (light alloy)
7 J x 16 H2
7.5 J x 17 H2
Wheel offset
1.22 in (31 mm)
1.42 in (36 mm)
All-season tires
2
2Radial-ply tires
205/55 R16 91H M+S
 -
Summer tires
2
 -
 -
Winter tires
2,3
3Not available as factory equipment.
205/55 R16 91H M+S .
225/45 R17 91H M+S .
or
225/45 R17 91H M+S .MOExtended
4
4Must be used in conjunction with Run Flat Indicator* only. 
         
        
        
     
        
        Page 436 of 474
435 Technical data
Rims and Tires
Mixed size tiresModel
C230Sport
C350Sport
Front axle:
Rims (light alloy)
7.5 J x 17 H2
Wheel offset
1.42 in (36 mm)
Summer tires
1
1Radial-ply tires
225/45 R17 91W
or
225/45 R17 91W MOExtended
2
2Must be used in conjunction with Run Flat Indicator* only.Rear axle:Rims
8.5 J x 17 H2
Wheel offset
1.18 in (30 mm)
Summer tires
1,3
3Must not be used with snow chains.
245/40 R17 91W
or
245/40 R17 91W MOExtended
2 
         
        
        
     
        
        Page 458 of 474

457 Index
Brake lamps
Cleaning lenses 344
Messages in display 377
Replacing bulbs 403
Brake pads
Message in display 370
Brakes 284
Warning lamp 25, 351
Break-in period 282
Bulbs, replacing see Replacing bulbs
C
CAC 449
California retail buyers and lessees, 
important notice 11
CAN system 449
Cargo area see Trunk
Cargo tie-down rings* 256
Carpets, cleaning 347
Catalytic converter 291
CD changer* 216
CD player* 137, 216
Centigrade see Temperature display 
mode 142Central locking
Automatic 107, 152
From inside 107
Locking/unlocking from inside 107
Switch 107
Certification label 428
Charcoal filter
Automatic climate control* 
(Canada only) 194
Children in the vehicle 74
Air bags 64
Blocking rear door window 
operation 85
Indicator lamp, front passenger 
air bag 80, 356
Infant and child restraint systems 74
LATCH-type child seat anchors 83
Occupant Classification System 
(OCS) 77
Cigarette lighter 262
Climate control system 176
Control panel 177
Defrosting, Front 181
Rear window defroster 175Clock 25, 130
Setting time 145, 146
Cockpit 22, 449
Cockpit Management and Data System 
see COMAND
Cold tire inflation pressure 331
Collapsible wheel chock 386
COMAND* 449
COMAND* see separate COMAND 
operating instructions
Combination switch 52, 122
Control system 130, 450
Multifunction display 130
Multifunction steering wheel 131
Resetting to factory default 140
Control system menu 130, 450
AUDIO 136
Menus overview 133
NAV* 138
Settings 140
Standard display 135
TEL* 157
Trip computer 155
Vehicle status message 
memory 138