Wheels and tiresVehicle features and op‐
tions
This chapter describes all standard, country-
specific and optional features offered with the
series. It also describes features that are not
necessarily available in your car, e. g., due to
the selected options or country versions. This
also applies to safety-related functions and sys‐
tems. The respectively applicable country provi‐
sions must be observed when using the respec‐
tive features and systems.
Tire inflation pressure Safety informationThe tire characteristics and tire inflation pres‐
sure influence the following:▷The service life of the tires.▷Road safety.▷Driving comfort.
Checking the tire inflation pressure
Check the tire inflation pressure regularly
Regularly check the tire inflation pressure,
and correct it as needed: at least twice a month
and before a long trip. If you fail to observe this
precaution, you may be driving on tires with in‐
correct tire pressures, a condition that may not
only compromise your vehicle's driving stabil‐
ity, but also lead to tire damage and the risk of
an accident. ◀
Tires have a natural, consistent loss of tire infla‐
tion pressure.
Tires heat up while driving, and the tire inflation
pressure increases along with the tire's temper‐
ature. The tire inflation pressure specifications
relate to cold tires or tires with the ambient
temperature.
Only check the tire inflation pressure when the
tires are cold. This means after driving no more
than 1.25 miles/2 km or when the vehicle has
been parked for at least 2 hours.
The displays of inflation devices may under-
read by up to 1.45 psi/0.1 bar.
For Flat Tire Monitor: after correcting the tire
inflation pressure, reinitialize the Flat Tire Moni‐
tor.
For Tire Pressure Monitor: after correcting the
tire inflation pressure, reset the Tire Pressure
Monitor.▷Reinitialize the Flat Tire Monitor.▷Reinitialize the Tire Pressure Monitor.
Checking the inflation pressure of the
emergency wheel
Located behind the bumper on the underside
of the vehicle is an opening for checking the
tire inflation pressure.
Pressure specifications
The tire inflation pressure table, refer to
page 177, contains all pressure specifications
for the specified tire sizes at the ambient tem‐
perature. Pressure specifications apply to ap‐
proved tire sizes and recommended tire
brands. This information can be obtained from
your service center.
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The defective wheel cannot be stored in the
emergency wheel bracket because of its
size.3.Check tire inflation pressure at the next op‐
portunity and correct as needed.4.Reinitialize the Flat Tire Monitor, refer to
page 85.
Reinitialize the Tire Pressure Monitor, refer
to page 82.5.Replace the damaged tires as soon as pos‐
sible.
Driving with emergency wheel
Watch the speed when driving with the
emergency wheel
Drive conservatively and do not exceed a speed
of 50 mph/80 km/h; otherwise, changed driving
characteristics such as reduced lane stability
while braking, extended braking distance and
changed self-steering properties in the limit
area. ◀
Mount one emergency wheel only
Only a single emergency wheel may be
mounted. Reinstall wheels and tires of the orig‐
inal size as quickly as possible; otherwise, there
is a safety risk. ◀
Vehicle battery
Maintenance
The battery is maintenance-free, i.e., the elec‐
trolyte will last for the life of the battery.
Your service center will be glad to advise you
on questions regarding the battery.
Battery replacement Use approved vehicle batteries only
Only use vehicle batteries that have been
approved for your vehicle by the manufacturer;
otherwise, the vehicle could be damaged and
systems or functions may not be fully availa‐
ble. ◀
After a battery replacement, have the battery
registered on the vehicle by your service center
to ensure that all comfort features are fully
available and that any Check Control messages
are no longer displayed.
Charging the battery
General information Make sure that the battery is always sufficiently
charged to guarantee that the battery remains
usable for its full service life.
The battery may need to be charged in the fol‐
lowing cases:▷When making frequent short-distance
drives.▷If the vehicle is not used for prolonged peri‐
ods, longer than a month.▷Steptronic transmission: when parked for
long periods of time in selector lever posi‐
tion D, R or N.
Note
Do not connect charging devices to the
12 volt socket in the vehicle
Do not connect battery chargers to the factory-
installed 12 volt sockets in the vehicle as this
may damage the vehicle battery due to an in‐ creased power consumption. ◀
Starting aid terminals In the vehicle, only charge the battery via the
starting aid terminals, refer to page 212, in the
engine compartment with the engine off.
Power failure
After a temporary power loss, some equipment
needs to be reset.
Individual settings need to be reprogrammed:
▷Time: update.Seite 209Replacing componentsMOBILITY209
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NNeck restraints, front, refer to Head restraints 38
Neck restraints, rear, refer to Head restraints 39
New wheels and tires 183
Nylon rope for tow-starting/ towing 214
O
OBD Onboard Diagnos‐ tics 198
Octane rating, refer to Recom‐ mended fuel grade 174
Odometer 64
Oil 192
Oil, adding 193
Oil additives 193
Oil change 194
Oil change interval, service re‐ quirements 65
Oil filler neck 193
Oil types, alternative 194
Oil types, approved 194
Old batteries, disposal 210
On-board computer 67
Onboard Diagnostics OBD 198
Onboard vehicle tool kit 199
Opening/closing via door lock 26
Opening/closing with remote control 24
Optional equipment, standard equipment 6
Outside air, refer to Automatic recirculated-air control 117
Own safety 7
P Paint, vehicle 217
Panoramic glass sunroof 32
Parallel parking assistant 108 Park Distance Control
PDC 106
Parked vehicle, condensa‐ tion 136
Parking aid, refer to PDC 106
Parking assistant 108
Parking brake 51
Parking lights 73
Passenger side mirror, tilting downward 41
PDC Park Distance Con‐ trol 106
Pedestrian warning with city braking function 90
Performance Control 95
Personal Profile 23
Phone 162
Pinch protection system, glass sunroof 33
Pinch protection system, win‐ dows 32
Plastic, care 218
Power failure 209
Power windows 31
Pressure, tire air pressure 176
Pressure warning, tires 84
Profile, refer to Personal Pro‐ file 23
Protective function, glass sun‐ roof 33
Protective function, win‐ dows 32
R
Radiator fluid 195
Radio, AM/FM stations 149
Radio, Apple iPod/iPhone 155
Radio, AUX-IN port 154
Radio, control ele‐ ments 149, 154
Radio, external devices 154
Radio, FM/AM 149
Radio, muting 149
Radio-operated key, refer to Remote control 22 Radio, overview 149, 154
Radio ready state 47
Radio, satellite radio 152
Radio, save stations 151
Radio, USB audio inter‐ face 155
Rain sensor 53
Rear fog lights 76
Rear lights 203
Rear luggage rack 139
Rearview mirror 40
Rear window de‐ froster 114, 117
Recirculated-air filter 117
Recirculated-air mode 113, 117
Recommended fuel grade 174
Recommended tire brands 183
Refueling 172
Remaining range 64
Remote control/key 22
Remote control, blocking 23
Remote control, malfunc‐ tion 25
Remote control, replacing the battery 22
Remote control, univer‐ sal 119
Replacement fuse 210
Replacing parts 199
Replacing the battery, remote control 22
Replacing wheels/tires 183
Reporting safety defects 9
RES button 100
Reserve warning, refer to Range 64
Resetting the tone set‐ tings 148
Reset, Tire Pressure Monitor TPM 82
Retaining straps, securing cargo 138
Retreaded tires 183 Seite 243Everything from A to ZREFERENCE243
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