
Display message
............................ 144
Emergency Tensioning Devices ....... .52
Fastening ......................................... 49
Fastening, front ............................... 50
Fastening in the rear, center ............50
Important safety guidelines .............47
Releasing ......................................... 51
Special seat belt retractor ...............55
Switching belt adjustment on/off
(on-board computer) ......................144
Warning lamp ................................. 158
Warning lamp (function) ................... 52
Seat heating
Indicator lamp (malfunction) ............79
Seats
Adjusting (electrically) .....................78
Adjusting the 4-way lumbar
support ............................................ 78
Adjusting the head restraint ............78
Cleaning the cover .........................210
Correct driver's seat position ........... 76
Important safety notes ....................76
Multicontour seat ............................ 78
Storing settings (memory function) .. 79
Switching seat heating on/off .........78
Switching seat ventilation on/off ....78
Sensors (cleaning instructions) 206, 209
Service interval display Displaying a service message (on-
board computer) ............................ 205
Service menu (on-board computer) .144
Service products Brake fluid ..................................... 261
Coolant (engine) ............................ 262
Engine oil ....................................... 261
Fuel ................................................ 258
Important safety notes ..................258
Notes ............................................. 258
Refrigerant (air-conditioning
system) .......................................... 261
Washer fluid .................................. .263
Setting a speed limit
see SPEEDTRONIC
Settings
Factory (on-board computer) .........144
Menu overview .............................. 174
On-board computer .......................144
Setting the air distribution .................94Setting the airflow
.............................. 94
Setting the date/time format see also Digital Operator's Manual 170
Setting the language
see also Digital Operator's Manual 170
Setting the time
see also Digital Operator's Manual 170
SETUP (on-board computer) .............144
Shift ranges ....................................... 101
Side marker lamp (display
message) ............................................ 144
Side marker lamps (changing bulbs) .86
Side windows Cleaning ......................................... 206
Important safety information ...........71
Opening/closing .............................. 71
Opening/closing (all) .......................71
Opening/closing (front) ...................71
Overview .......................................... 71
Troubleshooting ............................... 71
SIRIUS services
see also Digital Operator's Manual 170
Ski rack .............................................. 189
Sliding sunroof Important safety notes ....................71
Opening/closing .............................. 72
Operating manually ..........................72
SmartKey
Changing the battery .......................68
Changing the programming .............67
Checking the battery .......................68
Convenience opening feature ..........71
Display message ............................ 144
Door central locking/unlocking .......66
Important safety notes ....................66
Loss ................................................. 69
Malfunction ...................................... 69
Mechanical key ................................ 67
Overview .......................................... 66
Problem (malfunction) .....................69
Starting the engine ..........................98
SMS
see also Digital Operator's Manual 170
Snow chains ...................................... 230 Index
15

Protection of the environment
General notes
H
Environmental note
Daimler's declared policy is one of
comprehensive environmental protection.
The objectives are for the natural resources
that form the basis of our existence on this
planet to be used sparingly and in a manner
that takes the requirements of both nature
and humanity into account.
You too can help to protect the environment
by operating your vehicle in an
environmentally responsible manner.
Fuel consumption and the rate of engine,
transmission, brake and tire wear are affected
by these factors:
R operating conditions of your vehicle
R your personal driving style
You can influence both factors. You should
bear the following in mind:
Operating conditions:
R avoid short trips as these increase fuel
consumption.
R always make sure that the tire pressures
are correct.
R do not carry any unnecessary weight.
R remove roof racks once you no longer need
them.
R a regularly serviced vehicle will contribute
to environmental protection. You should
therefore adhere to the service intervals.
R always have service work carried out at a
qualified specialist workshop.
Personal driving style:
R do not depress the accelerator pedal when
starting the engine.
R do not warm up the engine when the vehicle
is stationary.
R drive carefully and maintain a safe distance
from the vehicle in front.
R avoid frequent, sudden acceleration and
braking. R
change gear in good time and use each gear
only up to Ôof its maximum engine speed.
R switch off the engine in stationary traffic.
R keep an eye on the vehicle's fuel
consumption. Genuine Mercedes-Benz parts
H
Environmental note
Daimler AG also supplies reconditioned major
assemblies and parts which are of the same
quality as new parts. They are covered by the
same Limited Warranty entitlements as new
parts.
! Air bags and Emergency Tensioning
Devices, as well as control units and
sensors for these restraint systems, may be
installed in the following areas of your
vehicle:
R doors
R door pillars
R door sills
R seats
R cockpit
R instrument cluster
R center console
Do not install accessories such as audio
systems in these areas. Do not carry out
repairs or welding. You could impair the
operating efficiency of the restraint
systems.
Have aftermarket accessories installed at
a qualified specialist workshop.
You could jeopardize the operating safety of
your vehicle if you use parts, tires and wheels
as well as accessories relevant to safety
which have not been approved by Mercedes.
This could lead to malfunctions in safety-
relevant systems, e.g. the brake system. Use
only genuine Mercedes-Benz parts or parts of
equal quality. Only use tires, wheels and Introduction
25 Z

Bead
The tire bead ensures that the tire sits
securely on the wheel. There are several steel
wires in the bead to prevent the tire from
coming loose from the wheel rim.
Sidewall The part of the tire between the tread and the
bead.
Weight of optional extras The combined weight of those optional extras
that weigh more than the replaced standard
parts and more than 2.3 kg (5 lbs). These
optional extras, such as high-performance
brakes, level control, a roof rack or a high-
performance battery, are not included in the
curb weight and the weight of the
accessories.
TIN (Tire Identification Number) This is a unique identifier which can be used
by a tire manufacturer to identify tires, for
example for a product recall, and thus identify
the purchasers. The TIN is made up of the
manufacturer's identity code, tire size, tire
type code and the manufacturing date.
Load bearing index The load bearing index (also load index) is a
code that contains the maximum load bearing
capacity of a tire.
Traction Traction is the result of friction between the
tires and the road surface.
TWR (Tongue Weight Rating)
The TWR specifies the maximum permissible
weight that the ball coupling of the trailer tow
hitch can support. Treadwear indicators Narrow bars (tread wear bars) that are
distributed over the tire tread. If the tire tread
is level with the bars, the wear limit of
áin
(1.6 mm) has been reached.
Occupant distribution The distribution of occupants in a vehicle at
their designated seating positions.
Total load limit
Nominal load and luggage load plus 150 lbs
(68 kg) multiplied by the number of seats in
the vehicle.
Changing a wheel
Flat tire
The "Breakdown assistance" section
(Y page 214) contains information and notes
on how to deal with a flat tire. Rotating the wheels
G
WARNING
Rotate front and rear wheels only if the tires
are of the same dimension.
If your vehicle is equipped with mixed-size
tires (different tire dimensions front vs. rear),
tire rotation is not possible. G
WARNING
Have the tightening torque checked after
changing a wheel. The wheels could come
loose if they are not tightened to a torque of
96 lb-ft (130 Nm).
Only use genuine Mercedes-Benz wheel bolts
specified for your vehicle's rims.
! On vehicles equipped with a tire pressure
monitor, electronic components are
located in the wheel. Changing a wheel
249Wheels and tires Z