Hi everyone,

On my 82 300CDT the ignition switch was bad, so to keep the car original I bought one from the dealership...120.00 ouch, ok, I read every thread, got pictures, and voila it is changed works great, no more sticking, but uh one problem...now the car is taking 5-10 seconds to cut off HELP!!! I promise I was fixing something that needed to be fixed! I was'nt doing my, "Gee that looks like something that can take a wrench" routine So what did I touch.?
Also lately (last week to 10 days) the oil pressure guage goes straight to 3 and stays there. All advice and answers greatly appreciated. Also re: the 91 SDL it's a no go Wifee really did not like the color, and the dealer said he must get 10K.

Thanks,

JOe

Did you change the actual ignition switch, or just the locking cylinder?

Just the Cylinder Tango.

There is a vacuum line near the back of the switch that controls engine shutdown. Maybe it was disturbed. Must not be completely off or you would not be able to shut down at all with the ignition switch. Or maybe you have a vacuum leak elsewhere.

Would vaccum cause a problem with the oil guage?
It was operating normally, now it just pegs 3 at start-up and stays there?
Do I have a vac gremlin ya think?

Here is a picture of the ignition switch. See the two vacuum connections.
http://catalog.eautopartscatalog.com/mercedesshop/sophio/wizard.jsp?partner=mercedesshop&clientid=mercedesshop&baseurl=http://catalog2.mercedesshop.com/&cookieid=1DX0L34WQ1DZ1AFT4X&year=1982&make=MB&model=300-DT-001&category=M&part=Ignition+Lock+Assembly

The oil pressure gauge is not affected by vacuum. So the oil pressure reads 3.0 at all rpm's? Meaning that is does not drop at idle?