Mercedes Repair Questions? Ask a Mechanic for Answers ASAP
Hi, my name is***** but there is no reset for this problem. Either both of your keys are bad or there is a fault with the electronic ignition switch. Since all this happened after you washed the key I would suspect that both keys are bad. The only thing you can try is to leave the old key in the ignition switch for 30 minutes then remove it and try to start the car. If the key will not turn in the ignition and everything was fine before you washed the other key I'd say you have two bad keys.