I have bought W220, 2001, S500 last week. It have 165k Kilometers on the clock and works perfectly fine beside only one issue. It does not lock or unlock from the key. I have to align the key to the door handle to get it lock/unlock. I got the car scanned but there were no errors displayed. I replaced the FOB batteries as well but it didn't work.!! KEY is perfectly fine as well, Light blinks on every button click. Looking for help.!!