i was driving my 300d on the garden state parkway when my oil pressure suddenly dropped. oil was everywhere and to make a long story short a mechanic off the parkway charged me 266 bucks to replace the oil line from the turbo. the problem is that now for some reason the brakes are extremely tough to press down and they feel really limited in their stopping power. also the car has begun dieseling and i have to press the manual stop lever inside the engine every time. what is the connection between all of these problems if any? i like working on my diesel but is this something a pro will need to check out? can anyone recommend a good mechanic in the d.c. area? i would also be happy to come over to someone's place one day and pay a reasonable amount to work these and some other nagging problems out for me. thanks

i could really use a hand on this one

You will usually get a little more response posting in diesel discussion.
It sounds like you may have lost some vacuum. You need to inspect the vacuum system. Start looking at/around the hose that runs from the vacuum pump to the vacuum booster. Not real sure why they would be working on that side of the car to repair the oil return but it sounds like something got knocked off or broken. That baby ain't dieseling - it's running which is caused by not enough vacuum to the shut off valve. You got a MightyVac don't you? Get it out and start troubleshooting.

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Jim