What is your question?
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What is your question?
I just bought this car 2 days ago and the guy i got it from has the red wires going from the fuse box where the circut 50 relay to the dash and has a button you gotta hold down and crank the key to start it but now its not starting
What makes this problem better or worse?
nothing
How long has your 2012 Mercedes-Benz C300 had this problem?
A few days

1 Reply
Hello, I’m Pete from the Car Genius team at RepairPal. I’m sorry you’re dealing with this concern on your 2012 Mercedes Benz C300. Based on the information provided it sounds like some aftermarket wiring and a control or switch was installed to allow the engine to start and run. With the complex computerized systems Mercedes vehicles use the no start concern can be tied to the aftermarket parts installed or other possible causes like a faulty electronic ignition switch, electronic steering lock failure (very common), an internal computer concern, wiring issues, or many other possible causes. With how complex this vehicle is the best thing to do is to have your vehicle checked over by a reputable shop that has experience working with the Mercedes model vehicles. This way the no start concern can be pinpointed and repaired properly. If you’d like to find a trusted, certified repair shop in your area, you can check here: https://repairpal.com/certified. If you need more advice, or have any further questions about your vehicle, we’re here to help. Just give us a call at 877-913-1554 where we will be happy to assist!