A new cargo liner has been made availabe for the GL-Class through Mercedes-Benz. It solves the problem of how to protect the area behind the third row AND behind the second row with the third row folded flat! Until now I have been using the ML-Class cargo liner, which is a little too short, and just folding it in half to put the third row up. It worked well until you needed the third row and the storage behind it. This mat simply velcros to the carpet at the top and bottom and folds as you raise the seats. It allows access to all of the tie down points and allows you to raise the seats individually. Perfect! You can order it from your local parts department.
GL-Class Foldable Cargo Liner – Part # BQ6750038 - MSRP $145