See also:

Putting ACC in standby mode
Before ACC can be used to regulate speed and/or the distance to a vehicle ahead, it must first be put in standby mode. To do so: Press . The symbol appears in the display and parentheses (---) ...

Operation
Steering wheel-mounted controls and display 1 Standby mode 2 Resume set speed 3 Deactivating 4 Activate/set speed 5 Set speed indicator (parentheses indicate standby mode) ...

Replacing the battery
1. Switch off the ignition. 2. Wait at least 5 minutes after switching off the ignition before disconnecting the battery so that all information in the vehicle's electrical system can be stored ...