I am away from home with limited tools and no wiring diagram. I do have a DVM. I thought it was the battery, but charging it overnight and also trying another known good battery didn't help with the no crank. It's an 83 300D turbo. All fuses look good and have voltage on them per DVM. All electrical accesories seem to work but I am not getting voltage to the glow plugs and the starter motor will not engage. I do not hear the starter solenoid clicking either when trying to start.

Questions:

1. Is there a start relay and where is it located?

2. How is the glow plug relay powered? Is it through the key switch or through another relay?

3. Can I jump the starter solenoid without crawling under the car? (do not have work clothes with me)

This is my first Benz and I am still getting to know where things are. Any help appreciated.

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85 300D turbo pristine w 157k when purchased 167,870 July 2025
83 300 D turbo 297K runs great. SOLD!
83 240D 4 spd manual- parted out then junked