See also:

Trailer towing
PARKTRONIC is deactivated for the rear area when you establish an electrical connection between your vehicle and a trailer. Fold in the ball coupling if the trailer tow hitch is not required. ...

Setting the exterior mirrors
If the battery has been disconnected or completely discharged, the exterior mirrors must be reset. The exterior mirrors will otherwise not fold in when you select the "Fold in mirrors whe ...

2009 Mercedes-Benz CL-Class Review
Sometimes, being the only car of a particular type or price can put you in a lonely place — lonely enough that automakers usually avoid it, preferring to make their own copy of what everyone else ...