Question about 2001 Mercedes-Benz C-Class

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Ignition switch does not turn on my 2001 c320

I insert the smart key and usually I would get the dash lit and the wheel would slant into driving position. Now, the key goes in and nothing, It will not even turn. I finally get it to turn and the car starts. I have to fight it for about 20 mins. How can I replace the switch, do I need to replace it all?

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  • 203 Answers

It is possible the immobilizer ring is defective(thid ring reads the rolling and number codes form the key. Does your central locking work and does the l.e.d. illuminate when the central locking buttons are pushed. The batteries may be weak and if they are they would have to be replaced and the resynchronized. The resynch procedure is probably in your owners manual. The e.i.s. (switch) is a control module and a complicated replacement procedure- it also takes a good 10 days to get parts because they have to reload it with a special key that made for your vehicle only. Try cleaning the lens on the key. It would also be a good idea to have the e.i.s. codes pulled at a dealer or equivalent. if problem persists. If the car will not start. try disconnecting the battery and wait approx. 15 min. sometimes that will give you a couple of starts unless it is just a software issue. I believe after so many starts these switches have to be replaced because the codes are now illogical; basically they do not reset and go back to zero.

Posted on May 31, 2009

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