Page 327 of 666
325 Operation
Engine compartment
4
Vehicles with steering wheel buttons*
\1
Press the button on the instru-
ment cluster (
\2
page 142).
\1
The following message is displayed
for the duration of the measurement
process:N
Engine oil level Measuring
in progress
The following messages may be dis-
played:NEngine oil
level OK
\1
Do not add oil.
Engine oil
Add
1.0 quart
\1
Add the amount of
oil shown
(\2
page 328).
\1
Check the engine oil
level again after a
few minutes.
Engine oil
Add
1.5 quartsEngine oil
Add
2.0 quarts
Engine oil
level Re-
duce oil
level
\1
The engine oil level is
too high. Have the oil
siphoned off.
Eng. oil
lev. Turn
ignition
on for lev-
el
\1
Switch on the igni-
tion (
\2
page 111).
N
nf_BA.book Page 325 Friday, January 25, 2008 3:53 PM
Page 341 of 666
339 Operation
Battery isolating switch*
4
\1
Take the key out of the ignition lock
and wait for approximately
20 seconds.
\1
Move red slide
2
down in the direc-
tion of the arrow and disconnect
connector
1
from the ground pin.
\1
Clamp connector
1
under the ac-
celerator pedal so that it cannot
make contact with the ground pin.
The consumers of the vehicle battery
are cut off from the electrical circuit.
!
CAUTION
Make sure that the key is in
position
0 in the ignition lock and
wait at least 20 seconds before dis-
connecting or connecting the battery
isolating switch. You could otherwise
damage electrical system compo-
nents.
Switching off the electrical system
!
CAUTION
When you clamp the connector under
the accelerator pedal, make sure that
the connector does not become:
\4
dirty
\4
damaged
It may otherwise not be possible to
restore the electrical connection
when the parts are reassembled.
nf_BA.book Page 339 Friday, January 25, 2008 3:53 PM
Page 342 of 666
340 OperationBattery isolating switch*
4
1Connector
2Ground pin
\1
Insert the key into the ignition lock.
\1
Press connector
1
onto ground pin
2
until you feel it engage.
The connector must be in full contact
with ground pin
2
.
All consumers are reconnected to
the power supply circuit.
Switching on the electrical system
nf_BA.book Page 340 Friday, January 25, 2008 3:53 PM
Page 375 of 666

373 Operation
Tires and wheels
4
\1
Switch on the ignition (
\2
page 111).
\1
Press the 5menu button on the in-
strument cluster until you see the +CAL TPMS
message in the display.
\1
Press the ,menu button on the in-
strument cluster.
The following message is displayed:OK TPMSThe tire pressure monitor activation
process has begun.
The tire pressures of the individual
wheels are stored as the new refer-
ence values if they are determined to
be plausible for the tire pressure
monitor.If you wish to cancel the activation pro-
cess:
\1
Press the .button or the 5menu but-
ton on the instrument cluster.
The activation process is canceled
automatically if 30 seconds elapse
with no input.
Checking tire inflation pressure elec-
tronically with the Tire Pressure Mon-
itoring System (TPMS)* (vehicles
with steering wheel buttons)Vehicles with steering wheel buttons are
equipped with the Advanced Tire Pres-
sure Monitoring System.
iUSA only:
The Tire Pressure Monitoring System
(TPMS) is equipped with a combina-
tion low tire pressure/TPMS mal-
function telltale in the instrument
cluster (
\2
page 20). Depending on
how the telltale illuminates, it indi-
cates a low tire pressure condition or
a malfunction in the TPMS system it-
self:
If the telltale illuminates continuous-
ly, one or more of your tires is signif-
icantly underinflated. There is no
malfunction in the TPMS.
nf_BA.book Page 373 Friday, January 25, 2008 3:53 PM
Page 376 of 666

374 OperationTires and wheels
4
The TPMS only functions on wheels that
are equipped with the proper electronic
sensors. It monitors the tire inflation
pressure, as selected by the driver, in all
four tires. A warning is issued to alert
you to a decrease in pressure in one or
more of the tires.
Tire pressure inquiries are made using
the multifunction display. The present
inflation pressures are displayed only af-
ter a few minutes’ travel time.
\1
Switch on the ignition (
\2
page 111).
\1
Press the
j
or
k
button until
the current inflation pressures for
each tire appear in the multifunction
display. If the telltale flashes for 60 seconds
and then stays illuminated, the TPMS
system itself is not operating proper-
ly.
iCanada only:
The Tire Pressure Monitoring System
(TPMS) is equipped with a low tire
pressure telltale in the instrument
cluster (
\2
page 20). If the telltale il-
luminates, one or more of your tires
is significantly underinflated.
iPossible differences between the
readings of a tire pressure gauge of
an air hose, e.g. gas station equip-
ment, and the vehicle’s control sys-
tem can occur. Usually the readings
issued by the control system are
more precise.
nf_BA.book Page 374 Friday, January 25, 2008 3:53 PM
Page 415 of 666

413 Operation
Maintenance and servicing
4
Vehicles with steering wheel buttons*If you have missed the service due date,
one of the following messages appears
in the display:\49
Service A overdue by .. days
\49
Service A overdue by ..
miles (km)
A signal also sounds.
Vehicles without steering wheel but-
tonsIf you have missed the service due date,
the following symbol flashes in the dis-
play for 10 seconds after the ignition is
switched on:\49
for service A
\4´
for service B
You will also see a minus sign before the
service due date.
Calling up the service due date
\1
Switch on the ignition (
\2
page 111).
The display is activated.
Vehicles with steering wheel buttons*
\1
Press the
è
or
ÿ
button on
the steering wheel repeatedly until
you see the standard display
(
\2
page 151) .
\1
Press the
j
or
k
button on
the steering wheel repeatedly until
you see the following in the display,
for example:
\49
Service A in .. days
\49
Service A in .. miles
(km)
The letters
A or
B indicate the type of
service that is due.
nf_BA.book Page 413 Friday, January 25, 2008 3:53 PM
Page 423 of 666

421 Operation
Cleaning and care of the vehicle
4
Outside of windshield and wiper
blades
\1
Turn key to position
1 in ignition lock
(
\2
page 111).
\1
Switch on windshield wipers
(\2
page 210).
\1
When the wiper arms are vertical,
turn key to position
0 in the ignition
lock or remove the key.
\1
Fold the wiper arms away from the
windshield until you feel them en-
gage in place.
\1
You can now clean the windshield
and the wiper blades.
\1
Fold the windshield wipers back
again before you switch on the igni-
tion.
Windows
!
CAUTION
Do not fold the windshield wipers
away from the windshield unless the
hood is closed. You will otherwise
damage the hood.
Warning
G
Switch off the ignition before cleaning the
windshield or the wiper blades. The wind-
shield wipers could otherwise move and
injure you.
!
CAUTION
Do not use a dry cloth, abrasive ma-
terial, solvent or solvent-based clean-
ing agent to clean the inside of the
windows. Clean the inside of the win-
dows with a damp cloth or a commer-
cially available glass cleaner. Do not
touch the inside of the rear and side
windows with hard objects, such as
an ice scraper or a ring. You could
otherwise damage the windows or
the rear window heating.
nf_BA.book Page 421 Friday, January 25, 2008 3:53 PM
Page 433 of 666
431 Practical hints
What to do if ...
5
Problem
Possible cause / result
Suggested solutions
The anti-theft alarm system is suddenly trig-
gered.
You have opened the vehicle using the key
while the anti-theft alarm system was still
primed.
Key:
\1Press theŒ button.
or
\1Insert the key into the ignition lock.
The anti-theft alarm system is deacti-
vated.
You hear a warning signal.
A message appears in the display.
\1Observe the instructions on
(\2page 484).
You are driving with the handbrake applied.
\1Release the handbrake (\2page 191).
You opened the driver’s door and forgot to
switch off the lights.
\1Turn the light switch to0.
Warning
G
You are not wearing your seat belt.
\1Fasten your seat belt .
nf_BA.book Page 431 Friday, January 25, 2008 3:53 PM