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Lou P. master tech
Lou P. master tech, Mercedes Technician
Category: Mercedes
Satisfied Customers: 4489
Experience:  15 years master certified 100% fix rate and have access to factory radio codes, wiring, and instructions.
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C300: I just changed the battery in my 2013 C300 key fob because

Customer Question

I just changed the battery in my 2013 C300 key fob because I was having trouble locking and unlocking my doors. Now it doesn't work at all
Submitted: 2 years ago.
Category: Mercedes
Expert:  Lou P. master tech replied 2 years ago.
did you replace it with the exact same battery? were the positive and negative sides installed correctly ? if you press and hold any button a little red light will come on near the panic button to let you know the battery is good. but the remote may still be faulty. do you have a second remote if so does it work ok? your remote may be faulty. they are sensitive to water and shock so if the key has been dropped a few times you may need to have it replaced, we have a tested at the dealer that can tell you if the key is actually working, autozone i believe also has a tester, it will tell you if the signals are being sent from the key, also there is a small square on the drivers door handle, point the key directly at the square and see if it now works, if so the key is definitely faulty. hope this helps. let me know if you have any more questions. i will do my best to help.Please take a second and click the box and rate my service GOOD OR EXCELLENT SERVICE if you feel I have been helpful and please request me in the future. If you feel I have not been helpful please DO NOT RATE BAD OR POOR AND WASTE YOUR MONEY , I will opt out to see if another expert can provide more or better assistance so you're not wasting your money!!. Thanks for choosing just answer. Lou. also , if you feel i deserve one , BONUSES are GREATLY APPRECIATED ! 😉Keep in mind that rating me does not end the chat, it simply credits me for assisting, i will still be here to help if follow up information is needed , Lou.