Mercedes-Benz C-Class Coupe Operator's Manual page 246

Stowage areas
244
Unless you are transporting cargo, the seat
backrests must remain properly locked in the
upright position.
In an accident, during hard braking or sudden
maneuvers, loose items will be thrown around
inside the vehicle. This can cause injury to
vehicle occupants unless the items are
securely fastened in the vehicle.
Always use the cargo tie-down rings.
The left-hand and right-hand rear seat
backrests can be folded down separately to
increase the trunk capacity.
Folding the seat backrest forward
i Vehicles with memory function: when you
fold one or both parts of the rear seat
backrest forwards, the respective front
seat moves forward slightly, when
necessary, in order to avoid contact.
X
Vehicles without memory function: if
necessary, move the driver's or front-
passenger seat forwards.
X
Open the trunk.
X
Pull right-hand or left-hand rear seat
backrest release handle :.
The corresponding rear seat backrest is
released.
X
Fold rear seat backrest ; forwards.
X
Move the driver's or front-passenger seat
back if necessary.
Folding the seat backrest back
X
Move the driver's or front-passenger seat
forward if necessary.
! Make sure that the seat belt does not
become trapped when folding the rear seat
backrest back. Otherwise, it could be
damaged.
X
Fold rear seat backrest : back until it
engages.
G
WARNING
Always lock the seat backrest in its upright
position when the rear seat bench is
occupied, or the extended cargo volume is not
in use.
Check for secure locking by pushing and
pulling on the seat backrest.
In an accident, during hard braking or sudden
maneuvers, loose items will be thrown around