Chiro

My 1998 E320 4Matic Wagon tailgate lock is malfunctioning. Once the car is locked I can't open the tailgate door with the remote . I have to manually open it with the mechanical key. Once I have done that I can open the door with the door (tailgate) handle. However, once the car is locked again the remote will not unlock the tailgate. You can hear it trying but no luck. I have to resort to the mechanical key. I'm guessing the acuator isn't pushing a rod far enough to open the latch?? Has anybody experienced this?

MARK CUMMINS

Remove the carpet trunk panel and clean/lube the lock assy and test the line to the lock for leaks from the pse..if all checks out the vacuum pod lock is defective

Chiro

Mark thanks for your reply. I am assuming that the lock is pneumatic and not electric. I am also assuming that the lock is fine as it opens with the mechanical key. I haven't removed the panel on the tailgate door but I guess that I have to so can access the locking mechanism and the PSE(?) Any hints on how to remove the tailgate door panel?...I managed to get the panel off by removing pins and obvious screws and then pushing the whole panel upward..came off easy. Changed the high brake light bulb well there P21W. Now I have to diagnose the problem..

Chiro

followed previous advice and lubricated everything possible. Up and running great now.

thanks for suggestions