The lighter should not have to be depressed to get the compartment closed. You might check the lighter to make sure it is fully seated into the lighter socket. There is a outer metal ring on the lighter make sure it is going all the way into the socket. You might press it all the way in and then pull up the knob just enough to dissengage but not enough to remove the lighter. Since you are a non-smoker you can always remove the lighter. If you look around you can find a "no smoking" plug that will take the place of the lighter and fill the socket.
<LI> 1988 300E Metallic Blue Black/light Gray MB-Tex leather interior
<LI> MBCA Member