
Driving stability control systemsVehicle features and optionsThis 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
systems. The respectively applicable country
provisions must be observed when using the
respective features and systems.
Anti-lock Braking System
ABS
ABS prevents locking of the wheels during
braking.
The vehicle contains its steering power even
during full brake applications, thus increasing
active safety.
ABS is operational every time you start the en‐
gine.
Brake assistant When you apply the brakes rapidly, this system
automatically produces the greatest possible
braking force boost. It reduces the braking dis‐
tance to a minimum during emergency stop.
This system utilizes all of the benefits provided
by ABS.
Do not reduce the pressure on the brake pedal
for the duration of the emergency stop.
Adaptive brake assistant In combination with the Active Cruise Control,
this system ensures that the brakes respond
even more rapidly when braking in critical sit‐
uations.Drive-off assistant
This system supports driving off on inclines.
The parking brake is not required.1.Hold the vehicle in place with the foot
brake.2.Release the foot brake and drive off with‐
out delay.
After the foot brake is released, the vehicle is
held in place for approx. 2 seconds.
Depending on the vehicle load or when a trailer
is used, the vehicle may roll back slightly.
Automatic Differential Brake The system controls the driving force by auto‐
matic braking intervention on individual
wheels. The function corresponds to a differ‐
ential lock: the system detects if a wheel be‐
gins to spin, because of loose road surface,
e.g., and automatically brakes it.
The driving force is diverted to the wheel with
better traction.
As a result, the engine force is transferred
more efficiently to the wheels during accelera‐
tions.
Dynamic Performance
Control DPC
The Dynamic Performance Control increases
both the agility of the vehicle as well as the
lane stability.
The system seamlessly handles the distribu‐
tion of the drive torque between the two rear
wheels.
Depending on the situation, the drive torque is
shifted from the wheel on the inside of the
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Displaying distribution of the drive
torque1."Vehicle info"2."xDrive status"3.  "Torque distribution"
HDC Hill Descent Control
The concept HDC is a downhill driving assistant that auto‐
matically controls vehicle speed on steep
downhill gradients. Without applying the
brakes, the vehicle moves at slightly more than
walking speed.
Hill Descent Control can be activated at
speeds below approx. 22 mph/35 km/h. When
driving downhill, the vehicle reduces its speed
to approx. walking speed and then keeps its
speed constant.
As long as there is active braking, the system
is on standby. The system does not brake the
vehicle during this time.
Only use HDC in low gears or in selector lever
position D or R.
Increasing or decreasing vehicle
speed
Specify desired speed in the range from ap‐
prox. 4 mph/6 km/h to approx. 15 mph/25 km/h
using the rocker switch of the cruise control on
the steering wheel. Vehicle speed can be
changed by lightly accelerating.
▷Press the rocker switch up to the point of
resistance: the speed increases gradually.▷Press up the rocker switch past the point
of resistance: the speed increases while
the rocker switch is pressed.▷Press the rocker switch down to the point
of resistance: the speed decreases gradu‐
ally.▷Press the rocker switch down past the
point of resistance: when driving forward,
the speed decreases to approx.
6 mph/10 km/h; when reversing, the speed
decreases to approx. 4 mph/6 km/h.
Activating HDC
Press button; the LED above the button
lights up.
Deactivating HDC Press button again and the LED goes
out. HDC is automatically deactivated
above approx. 37 mph/60 km/h.
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After the wheel change1.Tighten the lug bolts crosswise. The tight‐
ening torque is 101 lb ft/140 Nm.2.Stow the nonworking wheel in the trunk.
The nonworking wheel cannot be stored
under the cargo floor panel because of its
size.3.Check tire inflation pressure at the next op‐
portunity and correct as needed.4.Reinitialize the Flat Tire Monitor.
Reset the Tire Pressure Monitor.5.Check to make sure the lug bolts are tight
with a calibrated torque wrench.6.Replace the damaged tires as soon as pos‐
sible.
Driving with emergency wheel
WARNING
The emergency wheel has particular di‐
mensions. When driving with an emergency
wheel, changed driving properties may occur
at higher speeds, e.g. reduced lane stability
when braking, longer braking distance and
changed self-steering properties in the limit
area. There is risk of an accident. Drive moder‐
ately and do not exceed a speed of
50 mph/80 km/h.◀
Vehicle battery Maintenance
The battery is maintenance-free.
The added amount of acid is sufficient for the
service life of the battery.
More information about the battery can be re‐
quested from a dealer’s service center or an‐
other qualified service center or repair shop.
Battery replacement
CAUTION
Vehicle batteries that are not compatible
can damage vehicle systems and impair vehi‐
cle functions.There is risk of property damage.
Information on the compatible vehicle batteries
is available at your dealer's service center.◀
After a battery replacement, the manufacturer
of your vehicle recommends that the vehicle
battery be registered on the vehicle by a
dealer’s service center or another qualified
service center or repair shop to ensure that all
comfort features are fully available and that any
Check Control messages of these comfort fea‐
tures are no longer displayed.
Charging the battery
General information
Make sure that the battery is always suffi‐
ciently 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 pe‐
riods, longer than a month.
Information
CAUTION
Battery chargers for the vehicle battery
can work with high voltages and currents,
which means that the 12V on-board network
can be overloaded or damaged. There is risk of
property damage. Only connect battery charg‐
ers for the vehicle battery to the starting aid
terminals in the engine compartment.◀
Starting aid terminals
In the vehicle, only charge the battery via the
starting aid terminals, refer to page  250, in the
engine compartment with the engine off.
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Remote control, malfunc‐tion  39 
Remote control, univer‐ sal  174  
Replacement fuse  247 
Replacing parts  240 
Replacing wheels/tires  223 
Reporting safety malfunc‐ tions  10 
RES button  148 
RES button, see Active Cruise Control, ACC  145 
RES button, see Cruise con‐ trol  151  
Reserve warning, see Range  94 
Reset, Tire Pressure Monitor TPM  113 
Residual heat, automatic cli‐ mate control  169 
Retaining straps, securing cargo  197 
Retreaded tires  224 
RME rapeseed-oil methyl es‐ ter  211  
Roadside parking lights  105 
Roller sunblinds  48 
RON recommended fuel grade  210 
Roofliner  17 
Roof load capacity  261 
Roof-mounted luggage rack  198 
Rope for tow-starting/ towing  251 
RSC Run Flat System Com‐ ponent, see Run-flat
tires  225 
Rubber components, care  256 
Run-flat tires  225 
S Safe braking  193 Safety belt reminder for driv‐
er's seat and front passen‐
ger seat  58 
Safety belts  57 
Safety belts, care  257 
Safety Package, see Active Protection  135 
Safety switch, windows  48 
Safety systems, airbags  109 
Saving fuel  199 
Screen, see Control Dis‐ play  18 
Screwdriver, see Onboard ve‐ hicle tool kit  240 
Screw thread, refer to Screw thread for tow fitting, screw
thread for tow fitting  253 
Sealant  225 
Seat belts, see Safety belts  57 
Seat heating, front  54 
Seat heating, rear  56 
Seating position for chil‐ dren  64 
Seat, mirror, and steering wheel memory  60 
Seats  52 
Seats, front  52 
Seats, rear  55 
Seat ventilation, front  54 
Selection list in instrument cluster  97 
Selector lever, Steptronic transmission  81 
Self-leveling suspension, air suspension  141 
Self-leveling suspension, malfunction  142 
Sensors, care  257 
Service and warranty  8 
Service requirements, Condi‐ tion Based Service
CBS  238 
Service requirements, dis‐ play  95 
Services, ConnectedDrive SET button, see Active Cruise Control, ACC  145 
SET button, see Cruise con‐ trol  151  
Settings, locking/unlock‐ ing  44 
Settings on Control Dis‐ play  100 
Settings, storing for seat, mir‐ rors, steering wheel  60 
Shift paddles on the steering wheel  83 
Shift point indicator  88 
Shoulder support  54 
Side airbags  109 
Side View  161 
Signaling, horn  14 
Signals when unlocking  45 
Sitting safely  52 
Size  260 
Ski and snowboard bag  182 
Slide/tilt glass roof  49 
Smoker's package  176 
Snow chains  228 
Socket, OBD Onboard Diag‐ nostics  239 
Sockets, see Connecting electrical devices  178 
Soot particulate filter  193 
SOS button  248 
Spare fuse  247 
Spare tire, see Emergency wheel  244 
Speed, average  98 
Speed limit detection, on- board computer  99 
Speed limiter, display  96 
Speed Limit Information  96 
Speed warning  100 
Split screen  23 
SPORT+ - program, Dynamic Driving Control  143 
Sport displays, torque dis‐ play, performance dis‐
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