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Vehicle data, GL 550
The data stated here refers specifically to a vehicle with standard equipment. Consult an authorized Mercedes-Benz Center for the data for all vehicle variants and trim levels. ...

Functions available during a call
Overview Telephone operation with a single call 1 Person you are calling 2 Icon for active telephone connection 3 NEW to call other parties 4 To switch hands-free microphone on/off 5 T ...

Activation conditions
You can activate the HOLD function if:  - the vehicle is stationary.  - the engine is running.  - the driver's door is closed or your seat belt is fastened.  - the p ...