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Engine compartment
227
SLK 55 AMG
1
Filler cap
X
Unscrew filler cap 1 from filler neck.
X
Add engine oil as required. Be careful not
to overfill with oil.
Be careful not to spill any oil when adding.
Avoid environmental damage caused by oil
entering the ground or water.
!
Excess oil must be siphoned or drained
off. It could cause damage to the engine
and emission control system not covered
by the Mercedes-Benz Limited Warranty.
X
Screw filler cap 1 back on filler neck.
For more information on engine oil, see the
“Technical data” section (Y page 351) and
(Y page 354).
Transmission fluid level
Vehicles with automatic transmission:
The transmission fluid level does not need to
be checked. If you notice transmission fluid
loss or gearshifting malfunctions, have an
authorized Mercedes-Benz Center check the
transmission.
Coolant level
The engine coolant is a mixture of water and
anticorrosion/antifreeze.
When checking the coolant level, the vehicle
must be parked on level ground, and the cool-
ant temperature must be below 158‡
(70†).
G
Warning!
In order to avoid any potentially serious
burns:
R
Use extreme caution when opening the
hood if there are any signs of steam or
coolant leaking from the cooling system,
or if the coolant temperature indicator
indicates that the coolant is overheated.
R
Do not remove pressure cap on coolant
reservoir if coolant temperature is above
158‡ (70†). Allow engine to cool down
before removing cap. The coolant reser-
voir contains hot fluid and is under pres-
sure.
R
Using a rag, slowly open the cap approx-
imately
1
/
2
turn to relieve excess pres-
sure. If opened immediately, scalding hot
fluid and steam will be blown out under
pressure.
R
Do not spill antifreeze on hot engine
parts. Antifreeze contains ethylene gly-
col which may burn if it comes into con-
tact with hot engine parts.
SLK 350 (example illustration)
1
Coolant expansion tank
2
Cap
3
Marking bar in the expansion tank
Operation