The desired speed is also maintained downhill.
The speed may not be maintained on uphill
grades if the engine power is insufficient.
In ECO PRO driving mode, the vehicle may in‐
tentionally exceed or drop below the set desired
speed in some situations, for instance on down‐
hill or uphill grades.
The system cannot be activated if the radar sen‐
sor is not aligned correctly. This may be caused
by damage incurred, for instance during parking.
A Check Control message is displayed if the sys‐
Have the system checked by a dealer's service
center or another qualified service center or re‐
The system may be impaired when the detection
range of the radar sensor is partially covered
such as by the license plate holder.
The function for detecting and responding when
approaching stationary vehicles may be limited in
the following situations:
▷ During calibration of the camera immediately
after vehicle delivery.
▷ If the camera is malfunctioning or dirty. A
Check Control message is displayed.
Steering and traffic jam
The system assists the driver in keeping the ve‐
hicle within the lane. For this purpose, the sys‐
tem executes supporting steering movements,
for instance when driving in a curve.
The system determines the position of the lane
markings and the vehicle driving ahead using five
radar sensors and a camera.
Depending on the speed, the system orients it‐
self according to the lane markings or vehicles in
Sensors on the steering wheel detect whether
the steering wheel is being touched.
The system cannot serve as a substitute for the
driver’s personal judgment in assessing the
traffic conditions. Based on the limits of the
system, it cannot independently react to all traf‐
fic situations. There is a risk of accident. Adjust
driving style to traffic conditions. Watch traffic
closely and actively intervene where appropri‐
Button on the steering wheel
Steering and traffic jam assistant on/
off, refer to page 203.
The radar sensors are located in the bumpers.
Driver assistance systems
Online Edition for Part no. 01405A10E93 - VI/20