How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Peter Zavarelli Your Own Question
Peter Zavarelli
Peter Zavarelli,
Category: UK Car
Satisfied Customers: 29118
Experience:  Technical Consultant at Just Answer
14928985
Type Your UK Car Question Here...
Peter Zavarelli is online now
A new question is answered every 9 seconds

I have a 2012 ML350 CDI and it will start but, electrics are

Customer Question

Customer: hi I have a 2012 ML350 CDI and it will start but , electrics are not operating, seats,command,aircon,interior lights, will not go into D or R
JA: Thanks. Can you give me any more details about your issue?
Customer: engine runs, fans go on full, no interior electrics work
JA: OK got it. Last thing — JustAnswer charges a fee (generally around $18) to post your type of question to Mercedes Experts (you only pay if satisfied). There are a couple customers ahead of you. Are you willing to wait a bit?
Customer: yep
JA: OK. Now I'm going to take you to a page to place a secure deposit with JustAnswer. Don't worry, this chat is saved. After that, we will finish helping you.
Submitted: 1 year ago.
Category: UK Car
Customer: replied 1 year ago.
a relay under seat was changed and fault went for half a day, vehicle left overnight and fault returned.
Expert:  Peter Zavarelli replied 1 year ago.

My name is ***** ***** I am a professional here at Just Answer. I noticed that your question had not received a response and thought I would see if you still need help with this.I apologize for the delay and I hope I can still assist you with this here.

Inspect for water damage or water under the passenger front seat area,I have seen issues with water entering this area and damaging the front SAM control unit and other electronics causing issues like this here.If this has already been checked and found to be o.k. let me know so we can continue from here.

If more help is needed, use the reply tab to continue our conversation. If no further assistance is needed, kindly rate my service.You can rate at any time and we can continue to work on your question as this will not close out your question.Keep in mind in some cases it can be difficult to fully diagnose or help repair your vehicle without seeing it and I work on delivering the best possible answer from what I see to work with.

Thanks Pete

Customer: replied 1 year ago.
No idea why it would be water in the front interior of the car.... It's a w166 , the w164 are known for this on rear SAM ... It's been nowhere near any water deep enough to get into cabin .. I think it FRONT SAM but why would it work for half a day after they changed relay and the. When sag overnight for 12+ hours fault was back... No interior electrics work, power windows and mirrors central locking and instrument panel seem fine.
Expert:  Peter Zavarelli replied 1 year ago.

I apologize for any delay.

It is possible the relay was defective due to a short with the front sam and the new relay may have corrected the issue temporarily until the new relay shorted out/failed.I apologize as I didnt see the year on the model and thought this was a 164 chassis.

This does sound like the Front sam itself at fault here with it needing replaced and the relay may need replaced as well again after the sam replacement.I would have this checked into/tested further to be sure that this is the cause here before having it replaced.

Thanks Pete