Page 140 of 211

138Driving and operatingThe system is deactivated and will not
operate. When reverse gear is
selected no acoustic signal will
sound, indicating deactivation.
The function is reactivated by
pressing and holding r for approx.
3 seconds.
Fault
If the system detects an operating
fault, when selecting reverse gear a
continuous acoustic alarm will sound
for approx. 5 seconds, a
corresponding message appears in
the Driver Information Centre (DIC)
3 90 and F illuminates in the
instrument cluster 3 86. Consult a
workshop to have the cause of the
fault remedied.Caution
When reversing, the area should
be free from obstacles which could impact on the underside of the
vehicle.
Impact to the rear axle, which may
not be visible, could lead to
uncharacteristic changes in the
vehicle handling. In the event of
such an impact, consult a
workshop.
Vehicle messages 3 91.
Basic notes on parking assist system
9 Warning
Under certain circumstances,
various reflective surfaces on
objects or clothing as well as
external noise sources may cause the system to fail to detect
obstacles.
Special attention must be paid to
low obstacles which can damage
the lower part of the bumper.
Caution
Performance of the sensors can
be reduced when sensors are
covered, e.g. by ice or snow.
Performance of the parking assist
systems can be reduced due to
heavy loading.
Special conditions apply if there
are taller vehicles involved (e.g.
off-road vehicles, mini vans,
vans). Object identification in the
upper part of these vehicles
cannot be guaranteed.
Objects with a very small reflection
cross-section, e.g. objects of
narrow size or soft materials, may
not be detected by the system.
The parking assist system will not
avoid a collision with objects which are out of the detection range of
the sensors.
Page 164 of 211

162Vehicle careNo.Circuit1Adblue injection battery2Vehicle battery (with electronic
key system)3APC battery backup (with elec‐
tronic key system)4Heating and ventilation system5Adaptations6Adaptations7Heating and ventilation system8Additional heating and ventila‐
tion / air conditioning system9Supplementary heating and
ventilation system10Electric exterior mirrors / addi‐
tional adaptations11Heated exterior mirrors12Radio / multimedia / electric
exterior mirrors / diagnostic
socket13Multimedia / trailer hitchNo.Circuit14Courtesy lights / battery
discharge protection15Fuel injection system / tyre pres‐ sure monitoring system / elec‐
tronic key system16Hazard warning flashers / turn
and lane-change signals17Central locking18Left-hand high beam / right-
hand low beam / tail lights / left- hand daytime running light19Front fog lights / rear fog lights /
number plate lighting20Alarm / horn / lighting / wiper21Instrument cluster22Light switch23Rear window wiper / wind‐
screen washer pump / horn24APC general battery25Reversing lightsNo.Circuit26Brake switch27Fuel injection / starter28Airbag / steering column lock29Passenger power window30Power steering31Brake lights32APC battery backup (with elec‐
tronic key system)33Service display34Cigarette lighter / power outlet35Right-hand high beam / left-
hand low beam / sidelights /
right-hand daytime running light36Brake lights / ABS / immobiliser37Interior lighting / air conditioning38Starting with electronic key
system39Rear window wiper40Warning chimes
Page 204 of 211

202IndexAAbsorptive Glass Mat battery .....150
Accessories and vehicle modifications .......................... 145
Adaptive forward lighting .............98
Adblue .......................................... 93
AdBlue .......................... 88, 123, 182
AdBlue tank ................................ 197
Adjustable air vents ...................112
AGM battery ............................... 150
Airbag and belt tensioners ...........85
Airbag deactivation ................57, 85
Airbag label............................. 53, 57
Airbag system .............................. 53
Air conditioning regular operation ................................ 113
Air conditioning system .............. 104
Air intake .................................... 113
Air recirculation ...................104, 176
Air vents...................................... 112
Alert .............................................. 92
Antifreeze ................................... 148
Antilock brake system ................ 129
Antilock brake system (ABS) .......87
Anti-theft alarm system ................35
Anti-theft bolts............................. 171
Anti-theft locking system .............. 33
Anti-theft security lock ..................23
Appearance care ........................177
Armrest ........................................ 46Ashtrays ....................................... 79
Automatic anti-dazzle ..................39
Automatic fuel cut-off ..................119
Automatic light control .................97
Automatic locking ........................28
Autostop ....................... 89, 118, 119
Auxiliary heater ........................... 108
B Battery ........................................ 150
Battery discharge protection ......102
Battery, jump starting.................. 174
Belts.............................................. 49 Bench seat.................................... 68
BlueInjection ............................... 123
Bonnet ....................................... 146
Bottle holders................................ 68
Brake and clutch fluid .................182
Brake assist ............................... 130
Brake fluid .................................. 150 Brakes ............................... 128, 150
Brake system ............................... 86
Breakdown.................................. 176
Bulb replacement ....................... 154
C
Capacities .................................. 197
Car Pass ...................................... 20
Catalytic converter .....................123
Central locking system ................23
Centre high-mounted brake light 156