Page 8 of 400

ContentsTechnical data..................................  335
Spare parts service ............................  336
Warranty coverage .............................  337
Loss of Service and Warranty 
Information Booklet......................  337
Identification labels............................  338
Layout of poly-V-belt drive .................  339
C 230 Kompressor Sport..............  339
C 240/C 320 (all models) ............  339
C 32 AMG.....................................  339
Engine ................................................  340
Rims and Tires ...................................  342
Same size tires .............................  343
Mixed size tires ............................  344
Minispare wheel ...........................  345
Electrical system................................  346
Main dimensions................................  347
Weights ..............................................  348Fuels, coolants, lubricants, etc. .........  349
Capacities ....................................  349
Engine oils....................................  352
Engine oil additives ......................  352
Air conditioning refrigerant ..........  352
Brake fluid ....................................  352
Premium unleaded gasoline .........  353
Fuel requirements ........................  353
Gasoline additives ........................  354
Flexible Fuel Vehicles ...................  354
Coolants.......................................  356
Windshield washer and headlamp 
cleaning* system .........................  358
Consumer information .......................  359
Uniform tire quality grading .........  359
Technical terms...............................  361Index.................................................  367 
     
        
        Page 250 of 400

250 OperationAt the gas station
Open fuel filler flap by pushing at the 
point indicated by the arrow. 
The fuel filler flap springs open.
Turn fuel cap to the left and hold on to 
it until possible pressure is released.
Take off cap and set it in the recess on 
fuel filler flap.
To prevent fuel vapors from escaping 
into open air, fully insert filler nozzle 
unit.
Only fill your tank until the filler nozzle 
unit cuts out – do not top up or overfill. 
Replace fuel cap by turning it to the 
right.
You will hear when fuel cap is 
tightened.
Close fuel filler flap.Warning!
G
Overfilling of the fuel tank may create 
pressure in the system which could cause a 
gas discharge. This could cause the gas to 
spray back out when removing the fuel 
pump nozzle, which could cause personal 
injury. 
iOnly use premium unleaded gasoline 
with a minimum Posted Octane Rating 
of 91 (average of 96 RON/86 MON). 
Information on gasoline quality can 
normally be found on the fuel pump.
More information on gasoline can be 
found in the Factory Approved Service 
Products pamphlet.
Flexible Fuel Vehicles are identified by 
a label reading Premium gasoline or 
E85 only! on fuel filler flap.
For more information, see “Flexible 
Fuel Vehicles” (
page 354).
iLeaving the engine running and the fuel 
cap open can cause the? malfunc-
tion indicator lamp to illuminate.
For more information, see “Practical 
hints” (
page 276).
 
     
        
        Page 262 of 400

262 OperationTires and wheelsTire pressure changes by approx. 1.5 psi 
(0.1 bar) per 18°F (10°C) of air tempera-
ture change. Keep this in mind when 
checking tire pressure where the tempera-
ture is different from the outside tempera-
ture.
Tire temperature and tire pressure are also 
increased while driving, depending on the 
driving speed and the tire load.
Check the spare tire periodically for condi-
tion and inflation. Spare tires will age and 
become worn over time even if never used, 
and thus should be inspected and replaced 
when necessary.
Rotating wheels
On vehicles with the same wheel size all 
around, wheels can be rotated every 3 000 
to 6 000 miles (5 000 to 10 000 km), or 
sooner if necessary, according to the 
degree of tire wear. The same direction of 
tire rotation must be retained.Rotate the wheels before the characteris-
tic tire wear pattern becomes visible 
(shoulder wear on front wheels and tread 
center wear on rear wheels).
Thoroughly clean the inner side of the 
wheels after each rotation. Check and 
ensure proper tire inflation pressure.
Warning!
G
Follow recommended inflation pressures.
Do not overinflate tires. Overinflated tires 
can result in sudden deflation (blowout) 
because they are more likely to become 
punctured or damaged by road debris, 
potholes, etc.
Do not underinflate tires. Underinflated tires 
wear unevenly, adversely affect handling 
and fuel economy, and are more likely to fail 
from being overheated.
Do not overload the tires by exceeding the 
specified vehicle capacity weight (as indi-
cated by the label on the pillar in the driver’s 
door opening). Overloading the tires can 
overheat them, possibly causing a blowout.Warning!
G
Rotate front and rear wheels only if they are 
of the same size.
Warning!
G
Have the tightening torque checked after 
changing a wheel. Wheels could become 
loose if not tightened with a torque of 
80 lb-ft (110 Nm).
Only use genuine Mercedes-Benz wheel 
bolts specified for your vehicle's rims. 
     
        
        Page 276 of 400

276 Practical hintsWhat to do if …Problem
Possible cause
Suggested solution
?
The yellow “CHECK ENGINE” 
malfunction indicator lamp 
comes on while driving.
There is a malfunction in:
The fuel management system
The ignition system
The emission control system
Systems which affect emissions
Such malfunctions may result in excessive 
emissions values and may switch the engine 
to its limp-home (emergency operation) 
mode.
Have the vehicle checked as soon as 
possible by an authorized 
Mercedes-Benz Center.
An on-board diagnostic connector is 
used by the service station to link the 
vehicle to the shop diagnostics sys-
tem. It allows the accurate identifica-
tion of system malfunctions through 
the readout of diagnostic trouble 
codes. It is located in the front left 
area of the footwell next to the 
parking brake pedal.
The fuel cap is not closed tight.
Check the fuel cap.
Your gas tank is empty.
After refuelling start the engine three 
or four times in succession. 
The limp-home mode is canceled. You do 
not need to have your vehicle checked. 
     
        
        Page 293 of 400

293 Practical hints
What to do if …
Display symbol
Display message
Possible cause
Possible solution
A
RESERVE FUEL
GO TO GAS STATION!
The fuel level has dropped below the 
reserve mark.
Refuel at the next gas station 
(page 249).
CHECK GAS CAP!
SEE OPERATOR’S MANUAL
The fuel cap is not closed tightly.
Check the fuel cap (
page 249).
Y
HOOD OPEN!
You are driving with the hood open.
Close the hood (
page 252).
I
REMOVE KEY!
You have forgotten to remove the 
SmartKey.
Remove the SmartKey from the starter 
switch.
REPLACE KEY!
DRIVE TO WORKSHOP!
No additional code available for 
SmartKey.
Change the SmartKey.
.
3RD BRAKE LIGHT
CHECK LIGHT!
 
The high mounted brake lamp is 
malfunctioning.
Visit an authorized Mercedes-Benz 
Center as soon as possible.
AUTOM. LIGHT ON
REMOVE KEY!
SmartKey in starter switch position1 
or2.
Remove SmartKey from the starter 
switch.
BRAKE LIGHT
DRIVE TO WORKSHOP!
Brake lamp illumination is delayed or 
lamp is permanently on.
Visit an authorized Mercedes-Benz 
Center as soon as possible.
BRAKE LIGHT, L
CHECK LIGHT!
 
The left brake lamp is malfunctioning.
Visit an authorized Mercedes-Benz 
Center as soon as possible.
BRAKE LIGHT, R
CHECK LIGHT!
 
The right brake lamp is malfunctioning.
Visit an authorized Mercedes-Benz 
Center as soon as possible.
DISPLAY MALFUNCTION
VISIT WORKSHOP!
The display for the lamps or the system is 
malfunctioning.
Visit an authorized Mercedes-Benz 
Center as soon as possible. 
     
        
        Page 349 of 400
349 Technical data
Fuels, coolants, lubricants, etc.
Fuels, coolants, lubricants, etc.
Capacities
Vehicle components and their respectivelubricants must match. Therefore only use 
brands tested and approved by 
Mercedes-Benz. Please refer to the Factory Approved 
Service Products pamphlet, or inquire at 
your Mercedes-Benz Center.
Model
Capacity
Fuels, coolants, lubricants, etc.
Engine with oil filter
C 230 Kompressor Sport
C240
C320
C320Sport
C2404MATIC
C3204MATIC
C32AMG
5.8 US qt (5.5 l)
7.9 US qt (7.5 l)
7.9 US qt (7.5 l)
7.9 US qt (7.5 l)
7.4 US qt (7.0 l)
7.4 US qt (7.0 l)
7.9 US qt (7.5 l)
Approved engine oils
Automatic transmission
8.5 US qt (8.0 l)
MB Automatic Transmission Oil
Manual transmission
1.3 US qt (1.2 l)
MB Manual Transmission Oil
Rear axle
C 230 Kompressor Sport
C 240 (all models)
C 320 (all models)
C32AMG
1.2 US qt (1.1 l)
1.2 US qt (1.1 l)
1.2 US qt (1.1 l)
1.5 US qt (1.4 l)
Hypoid gear oil SAE 85 W 90 
     
        
        Page 350 of 400

350 Technical dataFuels, coolants, lubricants, etc.
Model
Capacity
Fuels, coolants, lubricants, etc.
Front axle
C2404MATIC
C3204MATIC
0.5 US qt (0.46 l)
Hypoid gear oil SAE 85 W 90
Transfer case
C2404MATIC
C3204MATIC
approx. 0.62 US qt (0.59 l)
MB Transfer case fluid
Power steering
approx. 1.1 US qt (1.0 l)
MB Power Steering Fluid (Pentosin CHF 11S)
Front wheel hubs
approx. 2.1oz (60g) each
High temperature roller bearing grease
Brake system
0.5 US qt (0.5 l)
MB Brake Fluid (DOT 4+)
Cooling system
C 230 Kompressor Sport
C 240 (all models)
C 320 (all models)
C32AMG
approx. 5.9 US qt (5.6 l)
approx. 6.8 US qt (6.4 l)
approx. 6.8 US qt (6.4 l)
approx. 6.8 US qt (6.4 l)
MB 325.0 Anticorrosion/antifreeze agent
Fuel tank
including a reserve of
16.4 US gal (62.0 l)
2.1 US gal (8.0 l)
Premium unleaded gasoline:
Posted Octane 91 (Avg. of 96 RON/86 MON)Flexible Fuel Vehicle (identified by a label 
reading Premium gasoline or E85 only! on 
fuel filler flap):
Alternative fuel: Ethanol fuel (E85) 
     
        
        Page 351 of 400
351 Technical data
Fuels, coolants, lubricants, etc.
Model
Capacity
Fuels, coolants, lubricants, etc.
Air conditioning system
R-134a refrigerant and special PAG lubricant oil 
(never R-12)
Windshield washer
3.2 US qt (3.0 l)
MB Windshield Washer Concentrate
1
Windshield washer and 
headlamp cleaning system*
6.4 US qt (6.0 l)
1Use MB Windshield Washer Concentrate “S” and water for temperatures above freezing point or MB Windshield Washer Concentrate “S” and commercially available
premixed windshield washer solvent/antifreeze for temperatures below freezing point. Follow suggested mixing ratios (page 358).