A back-up programme is in place should a fault occur in the control system.
If all selector lever positions are highlighted in the instrument cluster display, a system malfunction has occurred. In this case, the S tronic gearbox will switch to a backup programme. The vehicle can still be driven in the backup programme, however only at reduced speed and not in all gears. In certain cases, you may not be able to select reverse gear.
Caution!
If the gearbox switches to the back-up programme, drive to a qualified workshop without delay and have the fault rectified.