Mercedes Repair Questions? Ask a Mechanic for Answers ASAP
Hi, sorry for the wait I was away yesterday. The first thing you should do is test the starter directly at the solenoid and see if it works. You might just have a bad starter. Next step is to check fuse 52 and see if it's blown. If the fuse is good you will need to check the starer relay. If the relay is good you will need to check your actual values to see if you are getting a terminal 50 output to the relay.
Let me know what you find.
Possible causes are the gearshift is not reporting park position or there is a fault with the EIS or the ESL or the ECU. If the ECU does not get a park position signal from the TCU it will not authorize starting. If the EIS does not get an unlock signal from the ESL it will not authorize starting. You need to look at your actual values in the EIS and see if you are getting all of the necessary inputs to authorize starting.
Anytime water gets into the car there is the possibility of it causing problems but there isn't anything on the passenger side that I can recall that would cause a no crank condition. If the gearshift electronics got wet it could cause the problem though.
I'm not going to be able to remote in to you. What did you show for actual values?
Can you go into the EIS and look at the actual values when turning the key to the start position?