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. ...

Seating & Cargo
The GL550's front seats have a litany of power adjustments, including adjustable stiffness for the side bolsters. Even with the bolsters and lumbar support dialed all the way back, the seats are t ...

Important safety notes
Service products include the following:  - fuels (e.g. gasoline, diesel)  - additives for exhaust gas aftertreatment (DEF)  - lubricants (e.g. engine oil, transmission oil) ...