lamp in the instrument cluster (Y
page 229)
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 199).
Additionally, a warning tone sounds.
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 mounted
R mounted 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 290).
Observe the notes on tire pressure when
doing so (Y page 290).
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 seconds 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 repeatedly until the standard dis-
play is shown ( Ypage 189).
X Press the 0041or0068 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: Tire pressure
295Wheels and tires Z
ITY). These documents are supplied when
the vehicle is delivered.
Consumption figures were found in the cur-
rently valid respective version:
R for vehicles from the Euro 5 standard
according to regulation (EC) no.
715/2007
R for vehicles from the Euro 6 standard
according to regulation (EC) no.
595/2009
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 22).
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
recorded in the on-board computer; use the
steering wheel buttons to call up the Trip
computer menu (Ypage 197). 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.
! If DEF comes into contact with a painted
or aluminum surface, wash the surface off
immediately with plenty of water.
High ambient temperatures
When opening the DEF tank filler cap at high
outside temperatures, ammonia vapors may
escape. Ammonia vapors have a pungent
odor and are particularly irritating for your
skin, respiratory organs and eyes. This may
result in burning eyes, nose and throat, as
well as coughing and watering eyes. Do not
inhale ammonia vapors.
If DEF heats up, e.g. in direct sunlight, in the
DEF supply reservoir for some time to over
122 ‡ (50 †), ammonia vapor will develop.
Low ambient temperatures
DEF freezes at a temperature of approx-
imately 12 ‡(00F811 †). The vehicle is equipped
with a DEF preheating system at the factory.
Winter operation is therefore also guaranteed
at temperatures under 12 ‡ (00F811 †).
Additives and tap water
! Do not mix DEF with any additives and do
not dilute DEF with tap water. Otherwise,
the exhaust gas aftertreatment may be
damaged.
Observe the MB Specifications for Service
Products, Sheet No. 352.0.
Damage that arises through the use of addi-
tives or tap water will invalidate the New
Vehicle Limited Warranty. 324
Service products and capacitiesTechnical data
