193 Steering lock
Technical
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index Important!
If the electronic key is left in the steering lock position 0 
for an extended period of time, it can no longer be 
turned in the lock. In this case, remove electronic key 
from steering lock and reinsert.
Caution!
To prevent accelerated battery discharge and a possible 
dead battery, always remove the electronic key from the 
steering lock. Do not leave the electronic key in steering 
lock position 0.Notes:
A warning sounds when the driver’s door is opened 
while the electronic key is in steering lock position 1 
or 0.
If the electronic key cannot be turned in the steering 
lock, the vehicle battery may not be sufficiently charged. 
See battery on page 272 or jump starting on page 274.
With the engine at idle speed, the charging rate of the 
alternator (output) is limited.
It is therefore recommended that you turn off 
unnecessary electrical consumers while driving in stop-
and-go traffic. This precaution helps to avoid draining of 
the battery.
Unnecessary strain on the battery and charging system 
may be minimized by turning off the following power 
consumers, for example: Heated seats, rear window 
defroster. In addition, the automatic climate air volume 
control should be set to the lowest position.
The steering lock can only be unlocked with the vehicle 
battery properly charged and connected.
J_A208.book Seite 193 Donnerstag, 31. Mai 2001 9:35 09 
212 Driving instructions
Technical
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index
If the vehicle is parked after being driven on salt treated 
roads, the braking efficiency should be tested as soon as 
possible after driving is resumed while observing the 
safety rules in the previous paragraph.Winter driving
Have your vehicle winterized at your authorized 
Mercedes-Benz Center before the onset of winter.
•Change the engine oil if the engine contains an oil 
which is not approved for winter operation. For 
viscosity (SAE/CCMC class) and filling quantity, see 
page 318.
•Check engine coolant anticorrosion/antifreeze 
concentration.
•Additive for the windshield washer and headlamp 
cleaning system: Add MB Concentrate “S” to a 
premixed windshield washer solvent/antifreeze 
which is formulated for below freezing temperatures 
see page 259.
•Test battery: Battery capacity drops with decreasing 
ambient temperature. A well charged battery helps 
to ensure that the engine can be started, even at low 
ambient temperatures.
•Tires: We recommend M+S rated radial-ply tires on 
all four wheels for the winter season. Observe 
permissible maximum speed for M+S rated 
radial-ply tires and the legal speed limit.
Wa r n i n g !
If the vehicle becomes stuck in snow, make sure 
that snow is kept clear of the exhaust pipe and 
from around the vehicle with engine running. 
Otherwise, deadly carbon monoxide (CO) gases may 
enter vehicle interior resulting in unconsciousness 
and death.To assure sufficient fresh air ventilation, open a 
window slightly on the side of the vehicle not 
facing the wind.
J_A208.book Seite 212 Donnerstag, 31. Mai 2001 9:35 09