286 OperationEngine compartmentHood
Opening
1Release leverWarning!
G
Do not pull the release lever while the vehi-
cle is in motion. Otherwise the hood could
be forced open by passing air flow.
This could cause the hood to come loose
and injure you and/or others.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
You could be injured when the hood is open
– even when the engine is turned off.
Parts of the engine can become very hot. To
prevent burns, let the engine cool off com-
pletely before touching any components on
the vehicle. Comply with all relevant safety
precautions.Warning!
G
To help prevent personal injury, stay clear of
moving parts when the hood is open and the
engine is running.
The radiator fan may continue to run for
approximately 30 seconds or even restart
after the engine has been turned off. Stay
clear of fan blades.
Warning!
G
The engine is equipped with a transistorized
ignition system. Because of the high voltage
it is dangerous to touch any components (ig-
nition coils, spark plug sockets, diagnostic
socket) of the ignition system
with the engine running
while starting the engine
if ignition is “on” and the engine is
turned manually
447 Technical data
Electrical system
Electrical system
Model
CLS 550
CLS 63 AMG
Generator (alternator)
14 V/180 A
14 V/180 A
Starter motor
14 V/1.7 kW
12 V/2.1 kW
Battery
12 V/95 Ah
1
1Depending on production date, your vehicle may be equipped with a 12 V/100 Ah battery.
12 V/95 Ah
Spark plugs
Bosch F8 DPP 332U
NGK PFR 5R-11
NGK ILZKAR7A10
Electrode gap
0.039 in (1.00 mm)
0.039 in (1.00 mm)
Tightening torque
18.5 - 22 lb-ft (25 - 30 Nm)
15 - 18.5 lb-ft (20 -25 Nm)
