Can you bring the car here for me to work on?
You have me curious about root cause issue, I will charge a McDonald's #1 meal with coke.
Oh, and I ramble on about cars, so bring your iPod.

Note:
"75mercedes07", this issue has become very confused because of multiple threads.
My best advice for future reference; is to start one thread and stick with it.
Example:
wont start for anything!
wont start for anything! 1985 300SD

To help everyone involved.
Here are all of the links to your other related threads.

My Glow Plugs Won't Warm Up!
My Glow Plugs Won't Warm Up!

Starting Problems, hurrry girl stranded!
Starting Problems, hurrry girl stranded!

what the heck do i do??? (glow plug issues)
what the heck do i do??? (glow plug issues)

It won't glow anymore!!! ARGGGG!!!
It won't glow anymore!!! ARGGGG!!!

glow plug indicator isn't working... what do i do?!?
glow plug indicator isn't working... what do i do?!?

Glowing problems!
Glowing problems!