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Marty, Mercedes Technician
Category: Mercedes
Satisfied Customers: 53981
Experience:  Bosch Certified Master Tech. Over 35 years experience.
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I have a 2004 Mercedes C-240 sedan. A while back I was doing

Customer Question

I have a 2004 Mercedes C-240 sedan. A while back I was doing errands and upon
returning to my car was surprised that my key would not turn in the ignition.
After towing car to shop I was charged for Parts and Labor to replace the Ignition switch and Steering Lock . When I picked up the car I didn't immediately notice I had a
Malfunction reading LIGHT SENSOR ERROR DRIVE TO WORKSHOP. I called in after
returning home to report that was not a notification when I last started the car,
before the Ignition lockout problem. The owner said he didn't believe me since
they couldn't make a note of any malfunction alerts since the key wouldn't turn
on at the time they took possession. I want to know if it is reasonable that some
thing either was not re-assembled properly in the dash, they said had to be completely
disassembled to do the repair. Or somehow damaged or shorted out during repair.
The repair was started at one shop and finished at another and I was told there were
parts left over? Since then I had to have another costly repair done not related and
wanted the shop to diagnose this Malfunction about Light Sensor they called me to
pick up car which I did to find out they had replaced the Mass Flow Sensor DWH
but not diagnosed the Light Sensory issue. This sounds like an owner not wanting to step
up to me. I had to travel a long way by Ferry since I live on an island to pick the car
up and clearly needed more review before revisiting this with shop owner.
What are your evaluations and how should I proceed????
Submitted: 1 year ago.
Category: Mercedes
Expert:  Marty replied 1 year ago.

Hi, my name is***** light sensor fault that you are getting is caused by incorrect coding of the new ignition switch. The shop that programmed the ignition switch needs to correct the coding of the switch.

Let me know if you need anything else. Please rate my service in order for the website to credit me for answering your question.

Customer: replied 1 year ago.
Thank You I've called the repair shop an waiting for their response.
Expert:  Marty replied 1 year ago.

You're quite welcome.