I have a problem with my '85 300/240D. I have a 300D with a 240D engine and 4 spd manual transmission in it. The problem I have is that when I turn the key off, the engine keeps running. Short of popping the hood and hitting the kill switch, the only way I can shut it off is to pop the clutch with one foot on the brake. I encountered this problem a year or so ago with my '80 300D, and the problem turned out to be the vacuum valve on the ignition switch, behind the dash. I tore the instrument cluster out of it on Sunday and proceeded to replace this part when I noticed oil on the ignition switch and around the vacuum lines on the valve. I replaced the part and this did not solve the problem. Now I have no idea where to look. I figured that the vacuum pump is working fine since my door locks are still working properly and all other systems on the car work also. Any help here would be greatly appreciated.

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Mike

'80 300D
'84 300D
'85 300D
'87 300D