Drive authorization

In order to switch the terminal and/or start up the engine, the ID transmitter must only be located inside the passenger compartment (not necessarily in the fixture). The luggage compartment is classed as part of the passenger compartment in the R56. In principle, the authenticity check required is the same as that for access authorization (except that it is run via the interior aerials). If there are no ID transmitters inside the vehicle when the START/STOP button is pressed: Check Control message in the instrument panel. The terminals are switched when the START/STOP button is pressed. The sequence is: 0 -> terminal R -> terminal 15 -> terminal R -> 0.

To start the engine, the START/STOP button must be pressed briefly. The clutch pedal or brake pedal (manual gearbox or automatic gearbox respectively) must be depressed at the same time. An engine start is possible in any terminal position. Once the engine has been switched off, it may be restarted within 10 seconds even if no ID transmitter is detected inside the passenger compartment (i.e. no valid drive authorization). This safety precaution is required for any possible emergencies. Exception: if a door is opened within the 10 seconds, this after-run is cancelled immediately.