WARNINGThe general information relating to the use of assistance systems must be
observed » page 127, in section Introduction .
Functioning
Read and observe
on page 139 first.
Basic requirements for start of control The GRA is activated.
On vehicles with a manual transmission , the second gear or higher is en-
gaged.
On vehicles with an automatic transmission , the selector lever is in the D,
S position or in the Tiptronic position.
The current speed is higher than approx. 20 km/h.
This is only possible within the range which is permitted by the power output and braking power of the engine.
WARNINGIf the engine power and engine braking effect is insufficient to maintain
the set speed, vehicle operation must be taken over!
Operating Description
Fig. 151
Cruise control system controls
Read and observe on page 139 first.
Overview of the control elements of the CCS » Fig. 151ADeactivate CCS (delete set speed) Interrupt control (sprung position) Activate CCS (control deactivated)BTake control again a)
/ Increase speedCLaunch control / reduce speeda)
If no speed is set the current speed is adopted.
After the start of the regulation, the GRA regulates the vehicle to the current
speed and the warning light
illuminates in the instrument cluster.
After the interruption in control, the stored speed can be resumed by pressing
the
B
button.
Automatic control interruption
Automatic control interruption occurs if any of the following conditions are
met.
▶ By pressing the brake or clutch pedal.
▶ When one of the brake assist systems (e.g. ESC) intervenes.
▶ Through an airbag deployment.
WARNING■ Always deactivate the cruise control system after use to prevent the sys-
tem being switched on unintentionally.■
Control may only be resumed if the set speed is not too high for the cur-
rent traffic conditions.
Note
During control, speed can be increased by pressing the accelerator pedal. Re-
leasing the accelerator pedal will cause the speed to drop again to the set
speed.
Fatigue detection
Introduction
This chapter contains information on the following subjects:
Function
140
Information messages
140
The fatigue detection system (hereinafter referred to as system) recommends
the driver takes a break from driving when driver fatigue can be detected due
to the driver's steering behaviour.
139Assist systems
