Mercedes-Benz 2003 C 240 4MATIC Operator's Manual page 200

Controls in detail
Loading
Folding the backrest forward
The release handle 1 is located in the
trunk.
Pull release handle 1.
Retract head restraints fully and fold
rearward ( page 36).
200
Pull release handle 2 on the left or
right* backrest as required.
Fold seat cushion 3 forward.
Fold backrest 4 forward.
Setting up rear seat bench
Fold the backrest 4 rearward until it
engages.
Fold the seat cushions 3 rearward until
they lock into position.