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Discussion Starter #1
I found my 300d sedan having the following electrical issues.

I can easily turn on the engine after one glow plug cycle if the car park more than 1 hour with engine off.

But if I go to gas station to add some diesel on my way to office or home, then the engine can only be turned on after at least two glow plug cycles, it won't be turned on after one glow.

The starter was replaced by PO in 2009.

Also, I found the seat belt light was on twice yesterday (here was heavy rain),
and the climate control could not be turned on. No heat.
Today the climate is working again. Heat is back.

Anyone here experienced this before or could any member provide some advice on how to troubleshoot electrical issues?
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