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How to Fix Audio and Navigation Unit Issues

Model: Mercedes Classe E W211 - Years 2002-2009
Part: Car stereo

The following guide provides information on how to remove the CD player and GPS from your car. Some problems need to be addressed by professionals, but others can usually be resolved on your own.
If the "touch panel" is not calibrated, you can press the "calibration" option to calibrate the monitor. If there is no response, it is possible that the system is processing a previously given task. If the navigation unit does not start, it may be that the power cable is not connected or that one of the fuses is blown, and a replacement procedure should be initiated.

Updated on 12 February 2026 by ScegliAuto

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On the Peugeot 407, the boot may become stuck, possibly due to a problem with the control button or the lock actuator. In such cases, you can perform an emergency opening by following the simple procedure shown in this tutorial. First, open the rear doors, then lower the seat back by operating the release lever. Next, go inside the boot, locate the lock, and manually operate it using a flathead screwdriver. The boot will then be free to open.

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