Hello fellow MB diesel lovers,

A few days ago my 300d started having trouble turning over.

1. starter is cranking good
2. glow plugs seem to be heating up

I ran it in the morning and went back to run an errand in the afternoon and would not turn over. I let it sit for a couple days and then began trouble shooting. I charged the battery worried that it might be a voltage issue, but it would not start. I let it sit another day and then tried jump start and it turned over and worked the rest of the day. It worked even the next day. But then the following day went to start it and it would not turn over again. I tried the old jump start method again but no dice.

Please advise me on what I should do?