279 Operation
Engine compartment
Closing
Let the hood drop from a height of
approximately 1ft (30cm).
The hood will lock audibly.
Check to make sure the hood is fully
closed.
If you can raise the hood at a point
above the headlamps, then it is not
properly closed. Open it again and let it
drop with somewhat greater force.
Engine oil
The amount of oil your engine needs will
depend on a number of factors, including
driving style. Higher oil consumption can
occur when
the vehicle is new
the vehicle is driven frequently at
higher engine speeds
Engine oil consumption checks should only
be made after the vehicle break-in period.
Warning!
G
If you see flames or smoke coming from the
engine compartment, or if the coolant tem-
perature gauge indicates that the engine is
overheated, do not open the hood. Move
away from vehicle and do not open the hood
until the engine has cooled. If necessary,
call the fire department.Warning!
G
The engine is equipped with a transistorized
ignition system. Because of the high voltage
it is dangerous to touch any components
(ignition coils, spark plug sockets, diagnos-
tic socket) of the ignition system
with the engine running
while starting the engine
if ignition is “on” and the engine is
turned manually
Warning!
G
Be careful that you do not close the hood on
anyone.
iDo not use any special lubricant addi-
tives, as these may damage the drive
assemblies. Using special additives not
approved by Mercedes-Benz will
restrict your warranty entitlement.
More information on this subject is
available at any Mercedes-Benz
Center.
384 Technical dataElectrical systemModel
C 230 Kompressor (all models)
C 240 (all models)
C 320 (all models)
C55AMG
Generator (alternator)
14 V/120 A
14 V/120 A
14 V/150 A
Starter motor
12 V/1.1 kW
12 V/1.7 kW
14 V/1.7 kW
Battery
12 V/100 Ah
12 V/100 Ah
12 V/100 Ah
Spark plugs
Bosch F 6 MPP 332
Bosch F 8 DPP 332
NGK PFR 5 R-11
NGK ILFR 6 A
Electrode gap
0.031 in (0.8 mm)
0.039 in (1.0 mm)
0.031 in (0.8 mm)
Tightening torque
18–22lb-ft (25–30Nm)
15–22lb-ft (20–30Nm)
18–22lb-ft (25–30Nm)
