The coolant expansion tank is located in the
engine compartment on the right when
viewed in the direction of travel. X
Slowly turn cap :half a turn anti-clock-
wise and allow excess pressure to escape.
X Turn cap :further anti-clockwise and
remove it.
There is sufficient coolant in expansion
tank ;if the coolant is level with marker
bar =in the filler neck when cold or
approximately 1.5 cm higher when hot.
X If necessary, top up with coolant which has
been tested and approved by Mercedes-
Benz.
X Replace cap :and tighten all the way to
the stop.
For further information on coolant, see
(Y page 338). Windscreen washer system/head-
lamp cleaning system*
The washer fluid reservoir for the windscreen
washer system and headlamp cleaning sys-
tem* is located in the engine compartment on the left-hand side when viewed in the
direction of travel. i
Add windscreen washer concentrate to
the washer fluid all year round. G
Risk of fire
Washer fluid concentrate is highly flammable.
Fire, naked flames and smoking are prohibi-
ted when washer fluid concentrate is being
handled.
! Only use washer fluid concentrate which
is suitable for plastic lenses. Unsuitable
washer fluid concentrate could damage the
plastic lenses of the headlamps.
X Mix the windscreen washer fluid in a con-
tainer beforehand.
X At temperatures above freezing:
Fill the washer fluid reservoir with a mix of
water and windscreen washer concentrate
(e.g. MB SummerFit).
X At temperatures below freezing:
Fill the washer fluid reservoir with a mix of
water, antifreeze additive and windscreen
washer concentrate (e.g. MB WinterFit).
Adapt the mixing ratio to the outside tem-
peratures.
X To open: pull cap:upwards by the tab.
X Top up with the premixed washer fluid.
X To close: press cap :onto the filler neck
until it engages. 222
Engine compartmentOperation
* optional
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Problem
Possible causes/consequences and
X XSolutions J
The red brake
system warning
lamp comes on
while the vehicle
is moving. A
warning tone
also sounds. You are driving with the parking brake applied.
X
Release the parking brake.
The warning lamp goes out and the warning tone ceases. J
The red brake
system warning
lamp comes on
while the engine
is running. G
Risk of accident
The brake boosting effect is malfunctioning and the braking char-
acteristics may be affected.
X Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions. Do not continue driving
under any circumstances.
X Consult a qualified specialist workshop.
X Observe the additional messages in the multi-function display
(Y page 251). J
The red brake
system warning
lamp comes on
while the engine
is running. A
warning tone
also sounds. G
Risk of accident
There is insufficient brake fluid in the fluid reservoir.
X Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions. Do not continue driving
under any circumstances.
X Consult a qualified specialist workshop.
X Observe the additional messages in the multi-function display
(Y page 251).
Do not top up the brake fluid. This will not rectify the fault. ?
The red coolant
warning lamp
lights up while
the engine is
running and the
coolant temper-
ature gauge is at
the start of the
scale. The temperature sensor for the coolant temperature gauge is
faulty.
The coolant temperature is no longer being monitored. There is a
risk of engine damage if the coolant temperature is too high.
X
Pull over and stop the vehicle safely and switch off the engine,
paying attention to road and traffic conditions. Do not continue
driving under any circumstances.
X Consult a qualified specialist workshop. 284
TroubleshootingPractical advice
212_AKB; 2; 4, en-GB
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