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Ask Lou P. master tech Your Own Question
Lou P. master tech
Lou P. master tech, Mercedes Technician
Category: Mercedes
Satisfied Customers: 4087
Experience:  15 years master certified 100% fix rate and have access to factory radio codes, wiring, and instructions.
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Key not recognize by car and won't start, The car takes

Customer Question

Key not recognize by car and won't start
JA: Tell me a bit more about what's going on so he can help you best.
Customer: The car takes about an hour for every restart
JA: Are you hoping to fix this yourself?
Customer: Idk if I can
JA: Is there anything else the Mercedes Mechanic should be aware of about your Mercedes?
Customer: Not relly
JA: Our top Mercedes Mechanic is ready to take your case. Just pay the $5 fully refundable deposit and I'll fill the Mercedes Mechanic in on everything we've discussed. You can go back and forth with the Mercedes Mechanic until you're 100% satisfied. We guarantee it.
Submitted: 1 year ago.
Category: Mercedes
Customer: replied 1 year ago.
Posted by JustAnswer at customer's request) Hello. I would like to request the following Expert Service(s) from you: Live Phone Call. Let me know if you need more information, or send me the service offer(s) so we can proceed.
Expert:  Lou P. master tech replied 1 year ago.

Hello. What year and model are you working with ? And does the vehicle ever die on you ? Or just not restart after shutting off ?

Customer: replied 1 year ago.
The car is a 2011 ml350 4matic when the car is started in the morning no trouble however if u shut it off and try to restart no start after about an half an hour it may restart car never shut down
Expert:  Lou P. master tech replied 1 year ago.

Ok so the issue can be the PREFUSE jump start box in the engine bay. Will you try to fix yourself ? Cause it will take some electrical testing.

Customer: replied 1 year ago.
I took it to a shop the guy plug it up to the computer I was told that the keys need to be reprogram then I took it Mb service center and was told that I need to replace the ignition switch
Expert:  Lou P. master tech replied 1 year ago.

Ok so where is the car now ? It very well could be the ignition switch but that's why I want to check the fuses cause this is a very common issue. And the PREFUSE is usually the fault. Or the rear Sam control module.

Customer: replied 1 year ago.
The car is home now
Expert:  Lou P. master tech replied 1 year ago.

ok so I need you to get a test light and turn the key on and test every fuse for power in the drivers side engine bay fuse box. Let me know which fuses do not have power.