Here's the update:

I just got my car back from Enrique at Mr. MB motors. It turned out that the harsh vibrations in the engine were caused by bad motor mounts. He replaced the motor mounts, and the car now drives like it is brand new. I became so acustomed to driving the car with a rough idle that I didn't really realize how bad the problem really was.

As for the intermitent stalling, the fuel pump relay was the culprit. When I first took the car in I told him that I thought it could possibly be the hall effect sensor, but he said that since the stalling occurred when I was accelerating it could not be the problem. He said that the fuel pump relay was the most likely cause of the stalling, and he was 95% sure that this was the case. To date, the car hasn't stalled, so hopefully the problem has been fixed.

This was my first time taking my car to Enrique, and I would highly recommend him to anybody in Southern California. As posted in previous posts, he was extremely friendly and efficient. He had my car for only a day and even called to follow up and see how the car was running. He is the best mechanic I've encountered, and I'll definitely be going back to him for future problems. His prices were fair, and his diagnosis was spot on. If anybody has any other questions, feel free to e-mail me.

Brian

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'87 300E
Debadged
Euro Clear Corners
Updated '95 Tail Lights