I know that there are a lot of threads out there addressing this problem and I have read as many as I have found in the last few days.

Here's my problem:

My 91 300e 4matic was having some problems starting, I would have to keep the starter engaged an extra second or so. The other morning my car would not start (it turns over fine) when it was 30* F, I tried it again when I got home from work (40* F) and it still did not start.

My Questions:

Could this be the water temp sensor? Would this prevent the car from not starting at all? Would an adjustment to the EHA be helpful?

Answers to these questions and any hints on diagnosing the problem will be much appreciated.

Brian