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Function of the accident data recorder (ADR) (option
M47_00-0088-71
Open flap (1), remove sealing cap (2) from filler valve (3).
Note:
Due to variations in how the coupling is operated, the refuelling procedure may differ from filling station to filling station. Observe the general safety precautions on-site at the filling station concerned. Once started, the refuelling process runs and ends automatically. Operation
Note:
Before the refuelling coupling of the filler hose is attached, check filler valve (3) for damage and contamination.
Note:
Once flap (1) is opened, proximity switch (5) inhibits engine starting.
Note:
The current system pressure of the compressed-gas reservoirs can be seen on pressure gauge (4).
Function of the accident data recorder (ADR) (option)
The accident data recorder (ADR) is a system for detecting and recording accidents and driving events, e.g. pulling away against a kerb or sudden braking.
The accident data recorder (ADR) is activated automatically when the ignition is switched on.
Note:
The accident data recorder (ADR) remains active for 3 days after the ignition has been switched off and continues to register all vehicle movements (e.g. parking collisions).
Operation

M54_00-1502-71
As soon as the ignition is switched on, the accident data recorder (ADR) carries out a self-test and provides audible notification of the current operating status or the presence of a hardware fault.
Note:
A brief, one-off audible signal (buzzer in the control panel) (4) indicates that the accident data recorder (ADR) is ready for operation.
Note:
Indicator lamp (2) lighting up and a brief, one-off buzzing sound means that at least one event is stored.
Note:
A sequence of four long buzzes indicates that the accident data recorder (ADR) has detected a parking collision. Check your vehicle for damage.
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Eight short buzzes mean that the memory of the accident data recorder (ADR) is almost full to capacity. Export the events and have the memory cleared.
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Ten short buzzes mean that the accident data recorder (ADR) has malfunctioned. Similarly, a malfunction is present if no signal sounds. Following any critical traffic or accident situation, it is possible to record an entry manually.
Note:
When pushbutton (1) is pressed following an accident, the event (approximately 43 seconds before, during and after the accident) is stored and remains write-protected for an extended period.