C-Class (W203) 2001-2007, C160, C180, C200, C220, C230, C240, C270, C280, C300, C320, C230K, C350, Coupe

Key or EIS problem?

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Old Nov 29, 2013 | 04:14 AM
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C32
Key or EIS problem?

For the past two days I've had issues starting my car, as my key won't turn. After multiple tries and waiting it would eventually start. Today when I started the car I noticed my AC and windows did work, so I turned off the car and restarted it and all was fine. Later I went to start the car again and the key wouldn't turn again, and now my key isn't locking/unlocking. The red LED on the key flashes, and I did the IR trick with my camera to see if the transmitter flashed and I DIDN'T see a flash, but I'm not too sure how reliable that test is. I know it has to be either the key or EIS, what does it sound like to the experts out there?
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Old Nov 29, 2013 | 04:34 PM
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THE C350
Well the best way to diagnose a key vs EIS issue is to try it with a spare key... if you don't have one now is a good time to invest in one.
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Old Nov 29, 2013 | 11:52 PM
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I don't have a spare key. You're right though, I need to get one. That's $310 gone...
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Old Dec 3, 2013 | 12:32 AM
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THE C350
Try other dealers some are cheaper than others.
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