See also:

General notes
USA only: This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: 1. This device may not cause harmful interference, and 2. this device must a ...

Problems with the SmartKey
...

Fuse box on the left in the direction of travel
Open the hood. Remove any existing moisture from the fuse box using a dry cloth. AMG vehicles: remove the control unit above the fuse box. To open: undo screws 1 with an Allen key. ...