need a few advices. well my 78 300sd use to have a bad vacuum leak causing no power locks (well vacuum lock) i traced it back to the one vacuum line in the rear passanger side seat. it is near the edge of the door, near the seat belt thing.. so i put a piece of rubber hose around it and super glued it shut. i had vacuum lock for about 2 month now it is out again. any places that are problematic that u suggest i should look into? thxs for any advices