Traffic Jam Assist
Traffic Jam Assist helps the driver to keep in the lane, and also provides assistance when following
other vehicles in congestion or slow-moving traffic.
Traffic Jam Assist is an extension of the lane keeping system (Lane Assist) for vehicles with
automatic gearbox and combines its functions with the Adaptive Cruise Control (ACC). Please
therefore read both these chapters and observe the information about the system limits and
warnings.
Traffic Jam Assist function
Traffic Jam Assist can maintain a time interval set by the driver to a vehicle in front and help the
vehicle to stay in the lane →
.
The system automatically controls acceleration, braking, steering and, if required, will decelerate to a
stop behind a vehicle that is stopping, and then drive away again automatically.
Use Traffic Jam Assist only on motorways and well-developed country roads. Do not use Traffic Jam
Assist in urban traffic.
Switching Traffic Jam Assist on and off
Traffic Jam Assist is switched on and off in conjunction with adaptive lane guidance of the lane
keeping system in the Infotainment system (→ Vehicle settings menu, Operation).
Traffic Jam Assist can also be switched off together with the lane keeping system by pressing the
button for driver assist systems.
Technical requirements for using Traffic Jam Assist
—The lane keeping system is switched on and active together with adaptive lane guidance (→ Lane
keeping system (Lane Assist), Operation).
—Adaptive Cruise Control (ACC) is switched on and active (→ ACC, Operation).
—The selector lever is in position D/B or in the Tiptronic gate.
—The system has detected a road lane marking on both the right and left sides of the vehicle.
—The speed is under 60 km/h (35 mph).
Traffic Jam Assist is not active (indicator lamp for the lane keeping system
lights up yellow)
—As soon as one of the conditions indicated in Technical requirements for using Traffic Jam Assist
is no longer fulfilled.
—If one of the conditions for the proper functioning of the lane keeping system is no longer fulfilled
(→ Lane keeping system (Lane Assist), Introduction/General information).
—If one of the conditions for the proper functioning of the Adaptive Cruise Control (ACC) is no
longer fulfilled (→ ACC, Limits/System limits).
Switch off Traffic Jam Assist in the following situations
Traffic Jam Assist should always be switched off in the following situations due to system
limitations:
—When a high level of concentration is required by the driver.
—Very sporty driving.
—In poor weather conditions, e.g. snow or heavy rain.
—Poor road conditions.
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