My 2013 c-max energi, push button version will not start. "No-Key Detected" is only message. I've replace the batteries in both key fobs. It is at a local mechanic and they cannot get the car to respo … read more 3.4k. Name: Wilco. Ford Model: Kuga Vignale. Ford Year: 2018. UK/Ireland Location: Other/NonUK. Posted October 10, 2018. Focus MK3 radio's do no longer have a radio code. These radio's are also not linked to the VIN number of the car. The battery can be changed without problems. How to change battery in Ford C-Max key? Press the narrow end of the key together at the grooved section, lifting the middle back panel up, which you can then lightly pry away using a flat-head screwdriver. Lift out the metal key, then place your flat-head screwdriver under the opening in the back of the key, at the narrow top end of the key OCPTY 1X Flip Key Entry Remote Control Entry Remote key Fob Transponder Ignition Key for 11-18 for Ford for C-Max for Edge for Escape for Expedition for Flex for Lincoln MKX M3N5WY8609 164-R7995. 6. $3485. Save 8% with coupon. FREE delivery Tue, Nov 28 on $35 of items shipped by Amazon. For comparison, if your truck's battery drops to 11 volts it probably won't start your truck. You don't have to change them today, but the range will start getting a lot shorter until one day the fob just won't work. You can find the right batteries at Target, Walmart, and most drug stores. Reply Like. Locate your steering wheel-mounted information display controls. Press the left arrow button to access the main menu. On the main menu, select “Settings” by pressing “OK.”. Under “Settings,” scroll to the option that says “MyKey,” then press “OK.”. Under “MyKey,” search for the option that says “Clear MyKey.”. WVgfN9s.