Mercedes Repair Questions? Ask a Mechanic for Answers ASAP
Hi, replace fuse #9 in the main fuse box under the hood and see if you get power at B8 and see if the car starts.
Do you have 12V at fuse #9?
You must have a broken wire between the fuse and the connector. If you are 100% certain that you are checking B8 I would jump power to the terminal with a fused jumper lead and see if the car starts.
Let me know how you make out.