1989 300e

[briby]

So, my 1989 300E has been having that 'stall at stop lights' problem that seems to be the bane of several other people's existence. Additionally, I noticed that in neutral, the economy meter reads zero even under throttle (I'm assuming it's a vacuum leak). Others noted that these symptoms may point to a bad OVP relay, so yesterday I ordered a new one.

Unfortunately, this morning when I went to start my car, I turned the ignition and it cranked without starting. I tried again for several more seconds and then it made a loud noise along with a bit of a shake. I doubt this is the OVP now. Considering the noise and shake, I do not want to damage the engine by trying to start the car in this state.

With the stalling and now the starter problems, does anyone have any suggestions as to what the problem(s) may be?