Vacuum door locks dring me crazy
 

MY 1992 300-e WITH 39,0000 MILES HAS BEEN GINGING ME PROPLEMS WIT THE VACUUM DOOR LOCKS ,TRUCK AND GAS CAP. i CHECHED FUSE C AND IT IS OK. I DISCOVERED THE DRIVER'S SIDE DOOR LOCK IS HARD TO OPEN WITH THE KEY. AT ONE POINT I DISCONNECTED THE NEGITIVE LEAD FROM THE BATTERY AND THE VACUUM DOOR LOCK CAME BACK,KNOW THEY ARE NOT WORKING AGAIN ALONG WITH THE TRUNK VACUUM LOCK AND THE GAS CAP LOCK.

WHAT COULD BE WRONG?

BOB GECO

You should check the vacuum pump, and check the hoses and actuators for leaks. Sometimes you can isolate the leak by listening fo a continuing hiss after you actuate the lock.

Vacuum door lock problem 92 300E
 

Are the actuators part of each door look or the main pump under the rear seat?

Bob Geco

They are part of each lock.