
Vehicle care269Before and after winter, wash the
underbody and have the protective
wax coating checked.
Towing equipment
Do not clean the coupling ball bar with
a steam-jet or high-pressure jet
cleaner.
Air shutterClean the shutter system in the front
bumper to maintain correct
functionality.
Interior care
Interior and upholstery Only clean the vehicle interior,
including the instrument panel fascia
and panelling, with a dry cloth or
interior cleaner.
Clean the leather upholstery with
clear water and a soft cloth. In case of
heavy soiling, use leather care.
The instrument cluster and the
displays should only be cleaned using
a soft damp cloth. If necessary use a
weak soap solution.Clean fabric upholstery with a
vacuum cleaner and brush. Remove
stains with an upholstery cleaner.
Clothing fabrics may not be
colourfast. This could cause visible
discolourations, especially on light- coloured upholstery. Removable
stains and discolourations should be
cleaned as soon as possible.
Clean seat belts with lukewarm water or interior cleaner.Caution
Close Velcro fasteners as open
Velcro fasteners on clothing could
damage seat upholstery.
The same applies to clothing with
sharp-edged objects, like zips or
belts or studded jeans.
Plastic and rubber parts
Plastic and rubber parts can be
cleaned with the same cleaner as
used to clean the body. Use interior cleaner if necessary. Do not use any
other agent. Avoid solvents and petrol in particular. Do not use high-
pressure jet cleaners.
Floor mats9 Warning
If a floor mat has the wrong size or
is not properly installed, it can
interfere with the accelerator pedal
and/or brake pedal, what can
cause unintended acceleration
and/or increased stopping
distance which can cause a crash and injury.
Use the following guidelines for
proper floor mat usage.
● The original equipment floor mats
were designed for your vehicle. If the floor mats need replacing, it
is recommended that certified

Customer information295Operating data in the vehicleControl units process data for
operation of the vehicle.
This data includes, e.g.: ● vehicle status information (e.g. wheel rotation rate, speed,
movement delay, lateral
acceleration, "seatbelts
fastened" display),
● ambient conditions (e.g. temperature, rain sensor,
distance sensor).
As a rule such data is transient, not
stored for longer than an operational
cycle, and only processed on board
the vehicle itself. Control units often
include data storage (including the
vehicle key). This is used to allow information to be documented
temporarily or permanently on vehicle
condition, component stress,
maintenance requirements and
technical events and errors.Depending on the technical
equipment level, the data stored is as follows:
● system component operating states (e.g. fill level, tyre
pressure, battery status)
● faults and defects in important system components (e.g. lights,
brakes)
● system reactions in special driving situations (e.g. triggering
of an airbag, actuation of the
stability control systems)
● information on events damaging the vehicle
● for electric vehicles the amount of
charge in the high-voltage
battery, estimated range
In special cases (e.g. if the vehicle
has detected a malfunction), it may be
necessary to save data that would
otherwise just be volatile.
When you use services (e.g. repairs,
maintenance), the operating data
saved can be read together with the
vehicle identification number and
used when necessary. Staff working
for the service net-work ( e.g. garages,manufacturers) or third parties (e.g.
breakdown services) can read the
data from the vehicle. The same
applies to warranty work and quality
assurance measures.
Data is generally read via the OBD
(On-Board Diagnostics) port
prescribed by law in the vehicle. The operating data which is read out,
documents the technical condition of
the vehicle or individual components
and assists with fault diagnosis,
compliance with warranty obligations
and quality improvement. This data,
in particular information on
component stress, technical events,
operator errors and other faults, is
transmitted to the manufacturer
where appropriate, together with the
vehicle identification number. The
manufacturer is also subject to
product liability. The manufacturer
potentially also uses operating data
from vehicles for product recalls. This
data can also be used to check
customer warranty and guarantee
claims.

298IndexAAccessories and vehicle modifications .......................... 222
Active emergency braking ..........190
Adaptive cruise control .......114, 179
AdBlue ................................ 112, 163
Adjustable air vents ...................149
Airbag and belt tensioners .........109
Airbag deactivation ..............65, 109
Airbag label................................... 60
Airbag system .............................. 60
Air conditioning regular operation ................................ 150
Air conditioning system .............. 141
Air intake .................................... 150
Air vents...................................... 149
Antilock brake system ................ 170
Antilock brake system (ABS) .....111
Anti-theft alarm system ................37
Anti-theft locking system .............. 37
Appearance care ........................267
Armrest ................................... 55, 57
Armrest storage ........................... 74
Ashtrays ..................................... 101
Automatic anti-dazzle ..................42
Automatic light control ...............131
Automatic locking ........................30
Automatic transmission .............166
Autostop ..................................... 157
Auxiliary heater ........................... 149B
Baselevel display ........................115
Battery discharge protection ......140
Battery voltage ........................... 123
Belts.............................................. 58
BlueInjection ............................... 163
Bonnet ....................................... 224
Brake and clutch fluid .................273
Brake and clutch system ...........110
Brake assist ............................... 172
Brake fluid .................................. 227 Brakes ............................... 170, 227
Breakdown.................................. 265
Bulb replacement ....................... 230
C Capacities .................................. 284
Cargo management system ........84
Catalytic converter .....................163
Central locking system ................25
Centre console lighting ..............139
Changing tyre and wheel size ...254
Charging system ........................ 110
Child locks ................................... 31
Child restraint installation locations ................................... 69
Child restraints.............................. 67
Child restraint systems ................67
Climate control ............................. 16
Clock............................................. 97

301QQuickheat ................................... 149
R
Radio Frequency Identification (RFID) ..................................... 297
Radio remote control ...................22
REACH ....................................... 291
Reading lights ............................ 138
Rear floor storage cover ..............82
Rear fog light .............114, 136, 233
Rear seats .................................... 57
Rear view camera ...................... 204
Rear window wiper and washer ..96
Recommended fluids and lubricants ........................ 273, 277
Refuelling ................................... 214 Registered trademarks ...............294
Retained power off .....................155
Reversing lights .........................137
Ride control systems ..................173
Roof .............................................. 46
Roof load ...................................... 90
Roof rack ..................................... 89
S Safety belts ................................... 58
Safety net .................................... 86
Seat adjustment ............................. 7 Seat belt ........................................ 8
Seat belt reminder .....................108Seat belts ..................................... 58
Seat heating Seat heating, front .....................56
Seat heating, rear .....................58
Seat position ................................ 49
Selective catalytic reduction .......163
Selector lever.............................. 167
Service ............................... 150, 272
Service display .......................... 107
Service information ....................272
Side airbag system ......................64
Side blind spot alert ....................203
Sidelights .................................... 130
Side turn lights ........................... 239
Software acknowledgement .......291
Software update ......................... 293
Spare wheel ............................... 259
Speed limiter....................... 114, 177
Speedometer ............................. 104
Starting and operating ................152
Starting off ................................... 18
Starting the engine ....................155
Steering ...................................... 152
Steering wheel adjustment ......9, 93
Steering wheel controls ...............93
Stop-start system........................ 157
Storage ......................................... 73
Storage compartments .................73
Sunroof ........................................ 46
Sun visor lights .......................... 138Sun visors .................................... 45
Symbols ......................................... 4
T
Tachometer ............................... 106
Tail lights ................................... 233
Three-point seat belt .................... 59
Tools .......................................... 247
Tow bar....................................... 216
Towing ................................ 216, 265
Towing another vehicle .............266
Towing equipment .....................218
Towing the vehicle .....................265
Traction Control system ............. 173
Traction Control system off......... 112
Traffic sign assistant ...........115, 206
Trailer coupling ........................... 216
Trailer stability assist .................221
Trailer towing ............................. 217
Transmission ............................... 17
Transmission display .................166
Tread depth ............................... 253
Trip odometer ............................ 105
Turn lights .......................... 108, 136
Tyre chains ................................ 255
Tyre designations ......................249
Tyre pressure ............................ 249
Tyre pressure monitoring system ............................. 112, 251