Page 78 of 215

76Instruments and controls
Control indicator W illuminates if the
temperature is too high 3 80,
3 82.Caution
If engine coolant temperature is
too high, stop vehicle, switch off
engine. Danger to engine. Check
coolant level.
For physical reasons, the coolant
temperature gauge shows the coolant temperature only if the coolant level is adequate.
Engine oil level monitor
The engine oil level monitor is correct
only if the vehicle is parked on a level
surface with a cold engine.
If the engine oil level is correct when
the ignition is switched on OIL LEVEL
CORRECT appears briefly in the
Driver Information Centre.
If the engine oil is above the minimum level, press the trip computer button
on the end of the wiper lever within
30 seconds of switching on the
ignition. The message OIL LEVEL is
displayed in combination with the squares that correspond to the oil
level.
As the oil level diminishes, the
squares in the display are replaced
with dashes.▢▢▢▢▢▢=Maximum level▢▢▢- - -=Intermediate level- - - - - -=Minimum level
If the minimum engine oil level is
reached TOP-UP OIL LEVEL is
displayed in combination with control
indicator A after the ignition is
switched on for 30 seconds. Check
and top up engine oil 3 140.
To exit the oil level monitor display,
press either trip computer button.
Trip computer 3 86.
Service display
When the ignition is switched on, the
remaining distance before the next
service is due may be shown briefly in the Driver Information Centre. Based
on driving conditions, the interval at
which a service will be indicated can
vary considerably.
When the remaining distance before
the next service is less than
1800 miles or 2 months, SERVICE
IN appears in the Driver Information
Centre.
When the distance reaches 0 miles or
the service date is due, control
indicators o and A illuminate in the
instrument cluster and SERVICE
DUE appears in the Driver
Information Centre.
The vehicle needs a service. Seek the assistance of a workshop.
Resetting the service display After a service, the service displaymust be reset: if available, select the
distance before service display in the
Driver Information Centre, then press and hold button on end of wiper lever
for approx. 10 seconds until the
distance before service is displayed
continuously.
Trip computer 3 86.
Driver Information Centre 3 84.
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162Vehicle care
Relearn function
After changing the wheels, TPMS
needs to recalculate.
With the vehicle stationary, select the tyre pressure menu in the Driver
Information Centre by pressing button
on end of wiper lever. Press and hold button for approx. 4 seconds to
initialise recalculation. A
corresponding message appears in
the Driver Information Centre.
The relearn process is completed
after driving approx. 6 miles or
10 minutes. The system can only
provide limited information during this time.
If problems occur during the relearn
process, control indicator w remains
illuminated and a warning message is displayed in the Driver Information
Centre.
Driver Information Centre 3 84.
Vehicle messages 3 85.
General information
The use of commercially available
liquid tyre repair kits can impair the
function of the system. Factory-
approved tyre repair kits can be used.
Tyre repair kit 3 164.
External high-power radio equipment
could disrupt the TPMS.
Each time the tyres are replaced,
TPMS sensors must be dismounted
and serviced by a workshop.Tread depth
Check tread depth at regular
intervals.
Tyres should be replaced for safety
reasons at a tread depth of 2-3 mm (4 mm for winter tyres).
For safety reasons it is recommended
that the tread depth of the tyres on
one axle should not vary by more than 2 mm.
The legally permissible minimum
tread depth (1.6 mm) has been
reached when the tread has worn
down as far as one of the tread wear
Page 180 of 215

178Service and maintenanceService and
maintenanceGeneral information ...................178
Recommended fluids, lubricants and parts .................................... 179General information
Service information In order to ensure economical and
safe vehicle operation and to
maintain the value of your vehicle, it
is of vital importance that all
maintenance work is carried out at the proper intervals as specified.
The detailed, up-to-date service
schedule for the vehicle is available at
the workshop.
Service display 3 76.
Engine identification 3 182.
Service intervals - except Bus Maintenance of your vehicle is
required every 25,000 miles or after
2 years, whichever occurs first,
unless otherwise indicated by the
service display.
A shorter service interval can be valid
for severe driving behaviour, e.g. for
taxis and police vehicles.Service intervals - Bus only
Maintenance of your vehicle is
required every 20,000 miles or after
1 year , whichever occurs first, unless
otherwise indicated by the service
display.
Confirmations
Confirmation of service is recorded in the Service and Warranty Booklet.The date and mileage is completed
with the stamp and signature of the
servicing workshop.
Make sure that the Service and
Warranty Booklet is completed
correctly as continuous proof of
service is essential if any warranty or
goodwill claims are to be met, and is
also a benefit when selling the
vehicle.
Service display The service interval is based on
several parameters depending on
usage.
Page 182 of 215

180Service and maintenance
Additional engine oil additives
The use of additional engine oil
additives could cause damage and
invalidate the warranty.
Engine oil viscosity grades
The SAE viscosity grade gives
information of the thickness of the oil.
Multigrade oil is indicated by two
figures, e.g. SAE 5W-30. The first
figure, followed by a W, indicates the
low temperature viscosity and the
second figure the high temperature viscosity.
Select the appropriate viscosity grade
depending on the minimum ambient
temperature 3 184.
All of the recommended viscosity
grades are suitable for high ambient
temperatures.
Coolant and antifreeze
Use only silicate-free long life coolant
(LLC) antifreeze approved for the
vehicle. Consult a workshop.
The system is factory filled with
coolant designed for excellent
corrosion protection and frostprotection down to approx. -28 °C.
This concentration should be
maintained all year round. The use of additional coolant additives that
intend to give additional corrosion
protection or seal against minor leaks
can cause function problems. Liability
for consequences resulting from the
use of additional coolant additives will be rejected.
Brake fluid Over time, brake fluid absorbs
moisture which will reduce braking
effectiveness. The brake fluid should
therefore be replaced at the specified interval.