I went to get in my 1984 w123 300D to grab a CD, and as I unlocked the doors, the drivers door was the only door to unlock; the other doors remained locked. I locked the drivers door, and tried again; but again the only door to unlock was the drivers door. So I thought maybe if I ran the car it might fill up the vacuum system reserve so that all of the doors would unlock and lock at the same time (thinking that maybe there wasnt enough pressure in the vacuum system reserve to unlock all of the doors). So I had started the car, ran it at idle for about 30 seconds, and turned the key back to the off position; but the engine kept on running, even after I removed the key from the ignition; so I guess theres a leak in my vacuum system? am I right? What is going on here? And if its the vacuum system, which I am thinking it probably is, how much money do you think it will cost to have repaired? I love this car!!!! It is my first car, it is an 84 model year 300D in immaculate shape in and out (except the vacuum system now :-( It currently has only 106K miles, and I love it so much, I could never imagine being ithout it!!!!!!!! (I did have some oil leaks repaired, and im worried that oil my have/is leaking into the vacuum lines too)
Thanks for the help!