![]() ![]() Just install it, and you are ready to go. The VIN stored in the Ignition Module (EIS-EZS) matches that of the car it’s your old module, after all. Besides being a lot cheaper than installing a new ignition module, it also doesn’t require any programming or coding. Once the module is repaired, it is returned to you. ![]() You will need to remove the ignition module from your Mercedes-Benz and ship it to one of these companies that can test and repair the EIS-EZS. Some companies can repair Mercedes-Benz ignition modules. There is also a third option, which may be the cheapest way to fix the Mercedes ignition switch module. Several parts must be swapped because the stored VIN needs to be the same. You can’t replace the ignition switch only with one from a used Mercedes-Benz. Many owners install an ignition switch, ECU, shifter module, and other parts from a donor vehicle. Have the dealer install a new ignition switch, and they will program it to match the VIN of your Mercedes-Benz. This is an expensive repair that can cost several hundred dollars. If they conclude that the Ignition Switch (EIS-EZS) is the culprit, you will be told that the switch must be replaced. You may consider taking your car to the dealer or an independent shop and having them troubleshoot the problem. Hopefully, there are fault codes that will point you to the problem.ĭiagnosing Mercedes ignition problems isn’t a simple DIY job. If the ignition turns intermittently, consider yourself lucky and scan for codes. The only issue here is that if you can’t turn on the ignition, you can’t power on the OBD2 port and the scanner. If you don’t have this scanner or know of a shop that does, a possible alternative would be to use a YOUCANIC scanner. This scanner should still retrieve fault codes when the ignition is off. Try scanning your Mercedes-Benz for fault codes. If the other key works, keep using it for a couple of weeks to verify that the issue is the key and not the EIS. If you have a spare key, try to see if you are experiencing the same symptoms with the other key. How to fix Mercedes Ignition Switch ProblemsĪ defective key can very well cause these symptoms. That’s not necessarily the only solution see alternatives below. They will recommend that the module be replaced. ![]() Mercedes dealers don’t repairer a bad EIS-EZS module. While it can be diagnosed with Start Diagnostic Scanner used at dealerships, it can’t be repaired with this scanner.
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