Page 217 of 275
Vehicle care215
Grab the fuse with the fuse extractor
from the top or the side, depending on
the fuse type. Withdraw fuse.
Engine compartment fuse
box
The fuse box is in the front left of the
engine compartment.
Disengage the cover and remove it. Depending on the version, different
engine compartment fuse boxes are
available:
No.Circuit9Anti-theft alarm system10Stop-start system11Diesel exhaust system13Stop-start system15Electric power steering / Radar22Horn29Starter
Page 218 of 275
216Vehicle careNo.Circuit1Climate control2Steering wheel4Electric parking brake6Air vent16Front fog lights18Right high beam (Halogen) /
Right headlight (LED)19Left high beam (Halogen) /
Right headlight (LED)21StarterNo.Circuit22Heated windscreen26Additional Heater / Heated
windscreen
After having changed defective fuses,
close the fuse box cover and lock it.
If the fuse box cover is not closed
correctly, malfunction may occur.
Instrument panel fuse box
In right-hand drive vehicles, the fuse
box is located behind a cover in the
glovebox. Open the glovebox and
remove the cover.
Depending on the version, different
instrument panel fuse boxes are
available:No.Circuit1Electronic key system / Anti-
theft alarm system4Stop-start system5Advanced parking assist /
Camera / Transmission control
module7Amplifier8Rear wiper
Page 219 of 275
Vehicle care217No.Circuit10Central locking system11Central locking system13Anti-theft alarm system16Electrical power steering wheel18OnStar21Interior lights22Glovebox light23Blind spot alert system / Exterior
mirror adjustment / Inductive
charging24Column electrical assembly25Interior mirror26Seat belt reminder27Camera / Rain sensor / Auto‐
matic light control28USB / Infotainment31AirbagNo.Circuit33Power outlet front36InfotainmentNo.Circuit1Interior mirror / Electrical power
steering wheel / Selective ride
control / Radar / Diesel exhaust
system3Trailer provisions control
module4HornNo.Circuit5Windscreen washer6Windscreen washer7Power outlet rear10Doors lock / Tailgate lock11Doors lock / Tailgate lock12Stop-start system / Diagnostic
connector module / Brake
system13Infotainment / Climate control
system14Alarm siren15Climate control system16Stop-start system / Brake
system17Instrument cluster19Column electrical assembly /
Steering wheel controls21Anti-theft alarm system
Page 223 of 275

Vehicle care221Temperature dependencyThe tyre pressure depends on the
temperature of the tyre. During
driving, tyre temperature and
pressure increase. Tyre pressure
values provided on the tyre
information label and tyre pressure
chart are valid for cold tyres, which
means at 20 °C.
The pressure increases by nearly
1.5 psi for a 10 °C temperature
increase. This must be considered
when warm tyres are checked.
Tyre deflation detectionsystem
The tyre deflation detection system continually checks the rotation speed
of all four wheels and warns on low
tyre pressure condition once vehicle
is driving. This is achieved by
comparing tyre rolling circumference
with reference values and further
signals.
If a tyre loses pressure the control
indicator w illuminates and a warning
message is displayed in the Driver
Information Centre.In this case reduce speed, avoid
sharp cornering and strong braking.
Stop at next safe opportunity and
check tyre pressure.
Control indicator w 3 96.
After adjusting tyre pressure initialise
system to extinguish the control
indicator and restart system.Caution
Deflation detection system warns
just about low tyre pressure
condition and does not replace
regular tyre maintenance by the
driver.
In case of a system malfunction a
message is displayed in the Driver
Information Centre. Set correct tyre
pressure and reinitialise system. If the
failure continues to be displayed,
contact a workshop. The system is
inoperable when ABS or ESC has a
malfunction or a temporary spare
wheel is used. Once the road tyre has
been refitted, check the tyre pressure with cold tyres and initialise the
system.
System initialisation
After tyre pressure correction or
wheel change, the system must be
initialised to learn new circumference reference values:
1. Always ensure that all four tyres have correct tyre pressure3 255.
2. Apply parking brake. 3. Press w to reset deflation
detection system.
4. Reset is confirmed by pop-up indication.
Page 241 of 275
Service and maintenance239General information
Service information
In order to ensure economical and
safe vehicle operation and to
maintain the value of your vehicle, it
is of vital importance that all
maintenance work is carried out at the proper intervals as specified.
The detailed, up-to-date service
schedule for your vehicle is available
at the workshop.
Severe operating conditions exist if one or more of the following
circumstances occur frequently: Cold starting, stop and go operation, e.g.
for taxis and police vehicles, trailer
operation, mountain driving, driving
on poor and sandy road surfaces,
increased air pollution, presence of
airborne sand and high dust content,
driving at high altitude and large
variations of temperature.
Under these severe operating
conditions, certain service work may
be required more frequently than the
regular service interval indicated inthe service display. Contact a
workshop for customised service
schedules.
Service display 3 91.
Page 273 of 275

271RRadio Frequency Identification (RFID) ..................................... 266
Radio remote control ...................21
Rain sensor .................................. 98
REACH ....................................... 260
Reading lights ............................ 120
Rear floor storage cover ..............71
Rear fog light ...............98, 118, 210
Rear seats .................................... 50
Rear view camera ...................... 186
Rear window wiper and washer ..81
Recommended fluids and lubricants ........................ 242, 246
Refuelling ................................... 193
Registered trademarks ...............263
Reversing lights .........................119
Ride control systems ..................153
Roller blinds ................................. 41
Roof .............................................. 42
Roof load ...................................... 75
Roof rack ..................................... 74
S Safety net .................................... 72
Seat adjustment ............................. 7
Seat belt ........................................ 8
Seat belt reminder .......................92
Seat belts ..................................... 50Seat heating ................................. 49
Seat heating, rear .....................50
Seat position ................................ 44
Selective catalytic reduction .......143
Selective ride control ..................154
Selector lever ............................. 146
Service ............................... 132, 239
Service display ............................ 91
Service information ....................239
Service vehicle soon .................... 93
Side airbag system ......................57
Side blind spot alert ..............98, 181
Sidelights .................................... 112
Side turn lights ........................... 213
Software acknowledgement .......261
Software update ......................... 262
Spare wheel ............................... 228
Speed limiter......................... 99, 159
Speedometer ............................... 89
Sport mode ................................ 156
Starting and operating ................134
Starting off ................................... 17
Starting the engine ....................137
Steering ...................................... 134
Steering wheel adjustment ......9, 78
Steering wheel controls ...............78
Stop engine .................................. 94
Stop-start system........................ 138
Storage ......................................... 67
Storage compartments .................67Sunvisor lights ........................... 120
Sun visors .................................... 41
Symbols ......................................... 4
System check ............................... 94
T
Tachometer ................................. 89
Tailgate ......................................... 29
Tail lights ................................... 210
Three-point seat belt .................... 51
Tools .......................................... 218
Tow bar....................................... 195 Towing ................................ 195, 233
Towing another vehicle .............234
Towing equipment .....................196
Towing the vehicle .....................233
Trailer coupling ........................... 195
Trailer stability assist .................199
Trailer towing ............................. 196
Transmission ............................... 17
Transmission display .................146
Tread depth ............................... 222
Trip odometer .............................. 89
Turn lights ............................ 92, 117
Tyre chains ................................ 223
Tyre deflation detection system . 221
Tyre designations ......................219
Tyre pressure ............................ 220
Tyre pressures ........................... 255
Tyre repair kit ............................. 223