The glow plugs will be replaced today I had to order them. Now if I can figure out the Gas gauge no matter if the tank is full or not it only reads 1/4 of a tank. so I will search on that now.
Thank you guys I really appreciate all of your help with this. I really love driving this car it is Awesome.

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1st time Mercedes Owner.
1980 300D 123/130
what do ya expect for $600.00
Needs TLC