2005 Mercedes C-Class Owner's Manual - Page 341

Practical hints Unlocking/locking in an emergency Fuel filler flap In case the central locking system does not release the fuel filler flap, you can open it manually. Warning! G 1 Side trim 2 Release button Open the trunk lid. Remove the side trim 1 from the right-hand side of the luggage compartment. Turn release button 2 clockwise as far as will go. The fuel filler flap is released. Open the fuel filler flap from outside. 1 Locking Insert the mechanical key into the driver's door lock until it stops. Turn the mechanical key clockwise to position 1. The driver's door is locked. If you operate the emergency release button, be careful of the sharp edges so that you do not injure yourself. The release button is on the right-hand side of the luggage compartment behind the side trim. 339