standstill. Do not carry out any sudden steer-
ing maneuvers.
The tire pressure monitor has a yellow 0077
warning lamp in the instrument cluster for
indicating pressure loss/malfunctions (USA)
or pressure loss (Canada). Depending on how
the warning lamp flashes or lights up, an
underinflated tire or a malfunction in the tire
pressure monitor is displayed:
R if the 0077 warning lamp is lit continuously,
the tire pressure on one or more tires is
significantly too low. The tire pressure mon-
itor is not malfunctioning.
R USA only: if the 0077warning lamp flashes
for 60 seconds and then remains lit con-
stantly, the tire pressure monitor is mal-
functioning.
Only vehicles with steering wheel buttons: the on-board computer displays information on
tire pressure. After a few minutes of driving,
the current tire pressure of each tire is shown
in the on-board computer.
USA only: if the tire pressure monitor is mal-
functioning, it may be more than 10 minutes
before the malfunction is shown. The 0077
tire pressure warning lamp flashes for
60 seconds and then remains lit. When the
malfunction has been rectified, the 0077tire
pressure warning lamp goes out after a few
minutes of driving.
The tire pressure values indicated by the on-
board computer may differ from those meas-
ured at a gas station with a pressure gage.
The tire pressures shown by the on-board
computer refer to those measured at sea
level. At high altitudes, the tire pressure val-
ues indicated by a pressure gage are higher
than those shown by the on-board computer. In this case, do not reduce the tire pressures.
If radio transmitting equipment (e.g. wireless headphones, two-way radios) is operated
inside the vehicle or in the vicinity of the vehi-
cle, this can interfere with the operation of the tire pressure monitor. Checking the tire pressure electroni-
cally (vehicles with steering wheel but-
tons)
Tire pressure display
Using the steering wheel buttons
X Turn the key to position 2in the ignition
lock.
X Press the 0080or007F button repeatedly
until the standard display is shown
(Y page 187).
X Press the 0063or0064 button repeatedly
until the current pressure of the individual
tires is shown in the display.
If the vehicle is parked for longer than
20 minutes or you then drive at less than
18 mph (30 km/h), the Tire pres. dis‐ Tire pres. dis‐
played after driving for several played after driving for several
minutes minutes message appears.
i The tire pressure value shown in the dis-
play may differ from those measured at a
gas station using a pressure gage. The on-
board computer will generally give you a
more exact value.
Tire pressure loss warning system Vehicles with steering wheel buttons
If the tire pressure monitor detects a signifi-
cant pressure loss on one or more tires, the
on-board computer displays a warning mes-
sage. The 0077tire pressure loss warning
lamp in the instrument cluster (Y page 226)
lights up.
The tire pressure is shown in 2 red rectangles. The pressure of the tire concerned is shown in
one of the two rectangles (Y page 197). Addi-
tionally, a warning tone sounds. 292
Tire pressureWheels and tires
Each tire that is affected by a significant loss
of pressure is highlighted in the pressure dis-
play.
Restarting the tire pressure monitor When you restart the tire pressure monitor,
the currently set tire pressure are taken as
reference values for monitoring.
In most cases, the tire pressure monitor
detects the new reference values automati-
cally, e.g. after you have:
R changed the tire pressure
R changed wheels or tires
R installed new wheels or tires
However, you can also define reference val-
ues manually as described here.
Before restarting the tire pressure moni-
tor:
X Set the tire pressure to the value recom-
mended on the Tire and Loading Informa-
tion placard or the tire pressure table on
the B-pillar on the driver's side
(Y page 288).
Observe the notes on tire pressure when
doing so (Y page 288).
X Make sure that the tire pressure is correct
on all four wheels.
Restarting the tire pressure monitor
(vehicles without steering wheel but-
tons):
X Turn the key to position 2in the ignition
lock.
X Press the 0079menu button on the instru-
ment cluster repeatedly until the display
shows the following message:
+CAL- TPMS
+CAL- TPMS
X Press the 0074button on the instrument clus-
ter.
The display shows:
OK TPMS
OK TPMS
The tire pressure monitor activation proc-
ess has begun. The tire pressures meas-
ured for the individual wheels are stored as the new reference values, provided that the
tire pressure monitor considers them to be plausible.
If you wish to cancel the restart:
X Press the 0075button or the 0079menu button
on the instrument cluster.
The activation process is canceled auto-
matically if 30 second s elapse without
input.
Restarting the tire pressure monitor
(vehicles with steering wheel buttons): X Turn the key to position 2in the ignition
lock.
X Press the 0080or007F button on the steer-
ing wheel until the standard display
(Y page 187) appears in the display.
X Press the 0063or0064 button on the steer-
ing wheel repeatedly until the current pres-
sure of the individual tires is displayed or
the display shows the following message:
Tire
Tire pres. pres. displayed
displayed after
afterdriving
driving
for several minutes
for several minutes
X Press the 0045reset button on the instru-
ment cluster.
The display shows the following message:
Monitor current tire pressure? Monitor current tire pressure?
X Press the 0081button on the steering
wheel.
The display shows the following message:
Tire pres. monitor reactivated Tire pres. monitor reactivated
The tire pressure monitor activation proc-
ess has begun. The tire pressures meas-
ured for the individual wheels are stored as the new reference values, provided that the
tire pressure monitor considers them to be plausible.
If you wish to cancel the restart:
X Press the 0082button on the steering
wheel. Tire pressure
293Wheels and tires Z
i
Malfunctions resulting from paraffin sep-
aration can only be rectified by heating the
entire fuel system. Park the vehicle in a
heated garage, for example.
To prevent operating problems, diesel with
better flow qualities is available during the
winter months. You can obtain information at the gas station or from your fuel supplier.
Your vehicle is equipped with a fuel preheat-
ing system. This improves the flow properties
of the diesel by approximately 46 ‡ (8 †).
ULTRA-LOW SULFUR DIESEL can be used
without risk of malfunction down to an out-
side temperature of approximately 14 ‡
(00F810 †).
Fuel additives
! Do not add gasoline or kerosene to diesel
fuel to improve its flow characteristics.
Gasoline or kerosene impairs the lubricat-
ing properties of the diesel fuel. This can
result in damage to the fuel injection sys-
tem, for example.
Information on fuel consumption H
Environmental note
CO 2(carbon dioxide) is the gas which scien-
tists believe to be principally responsible for
global warming (the greenhouse effect). Your
vehicle's CO 2emissions are directly related to
fuel consumption and therefore depend on:
R efficient use of the fuel by the engine
R driving style
R other non-technical factors, such as envi-
ronmental influences, road conditions or
traffic flow
You can minimize your vehicle's CO 2emis-
sions by driving carefully and having it serv-
iced regularly.
Fuel consumption depends on: R the vehicle version
R the style of driving R
the operating conditions
R the type or quality of the fuel used
The vehicle will use more fuel than usual in the following situations:
R at very low outside temperatures
R in city traffic
R during short journeys
R on mountainous terrain
R when towing a trailer
To keep fuel consumption low, observe the
advice in the "Protection of the environment" section (Y page 23).
The following components of the different
vehicle versions influence fuel consumption:
R tire sizes, tire tread, tire pressure, tire con-
dition
R body
R transmission ratios for the drive assem-
blies
R additional equipment (e.g. air-conditioning
system, auxiliary heating system)
For these reasons, the actual consumption
figures for your vehicle may deviate from the
consumption figures determined according
to EU Directive 80/1268/EEC.
Data concerning fuel consumption are recor- ded in the on-board computer; use the steer-
ing wheel buttons to call up the Trip com-
puter menu (Y page 195).
Diesel Exhaust Fluid (DEF) General notes
! Only use DEF in accordance with
ISO 22241. The exhaust gas aftertreatment system may otherwise be damaged.
Observe the MB Specifications for Service
Products, Sheet No. 352.0.
Damage caused by the use of other reduc-
ing agents will invalidate the New Vehicle
Limited Warranty. 320
Service products and capacitiesTechnical data