Hi:

Was driving my 74 240D home from work today and all of a sudden noticed lots of smoke in the rear view mirror then the engine began running very fast and would not turn off. This is my first diesel Mercedes so things are still a little unfamiliar. Anybody have any ideas? Vacuum lines looked good and most of the little one way vacuum valves are new. Also, vacuum pump was rebuilt by previous owner last year. The only maintenance manual I have doesn't cover diesel engine troubleshooting.

Thanks.
Drew