If reverse is engaged again after a short
distance, the function is active again.
▷ During activation or intervention by driver
assistance systems.
▷ When the view on the control display is
overlaid with messages.
▷ In case of a slippery surface.
▷ When the vehicle is rolling such as on a
slope.
▷ In case of changed ambient conditions.
▷ If the vehicle speed exceeds approx.
6 mph/10 km/h.
Turning trailer protection brake
on/off
The trailer brake intervention system helps
prevent the vehicle-trailer combination from
rolling away in an uncontrolled way. Whenever
the Trailer Assistant is canceled, the trailer
protection brake is applied and the vehicle is
secured at a standstill. The trailer protection
brake can be switched on or off.
Go through the menu as follows via iDrive:
Apps menu / "Vehicle" / "Driving settings" /
"Driver Assistance" / "Parking" / "Trailer
protection braking".
System limits
Speed threshold
The maximum speed is limited to approx.
6 mph/10 km/h.
If the maximum speed is exceeded, the func-
tion is interrupted.
A warning is given at a speed of approx.
4 mph/7 km/h.
Functional limitations
Trailers with fifthwheel steering are not sup-
ported.
When maneuvering, the following can restrict
the Trailer Assistant or cause a collision:
▷
Accessories on tow bar, e.g., a rear bicycle
rack.
▷ Tow bars and trailers with unusual shapes.
▷ Unsuitable removable trailer hitches.
▷ Rearview camera is dirty or covered.
Additional information:
Cameras, refer to page 34.
Trailer stabilization control
Principle
Trailer stabilization control helps by absorbing
the swinging movements of the trailer.
The system detects swinging and automati-
cally brakes the vehicle quickly in order to
leave the critical speed range and stabilize the
trailer.
General information
If the trailer power socket is occupied but a
trailer has not been hitched, the system can
also become active in extreme driving situa-
tions, e.g., when using a bicycle rack with light-
ing.
Functional requirement
The following functional requirements apply for
trailer stabilization control:
▷
A trailer is attached.
▷ The trailer power socket is occupied.
▷ Vehicle speed must be more than approx.
40 mph/65 km/h.
System limits
The system cannot intervene or not intervene
in time in the following situations, for instance:
▷
If a trailer jackknifes suddenly, for instance
on slippery roads or loose surfaces.
▷ If a trailer with a high center of gravity tilts,
before swinging is detected.
Seite 304
DRIVING TIPS
Trailer and rear carrier
304
Online Edition for Part no. 01405A8A536 - VI/23
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