You take a higher end OBD tool (hint: not the kind you'd buy at Auto Zone), access the keyless entry module, and select "invalidate all fobs" from the menu. Once that procedure is done, any key fob the vehicle is set up will be forgotten, and you can program the module to accept a new key fob.
what is the reason for not fixing camera in key fob
Free On Board (FOB)
C200 key fob problem
By driving with the key fob in the ignition.
You do not have to reset the key fob when changing the battery.
A key fob is for instance a mini card on your keyring, for instance I have a tesco's clubcard key fob on my keyring therefore when I put petrol in my car and pay at the checkout instead of finding my clubcard I get my key fob!
how do i reset key fob for a vw golf 2001 how do i reset key fob for a vw golf 2001
The key fob doesn't get reset... the keyless entry module gets programmed to accept commands from that key fob. If your key fob suddenly stops working and it's not a battery issue, then you either have a problem with your key fob itself, or the keyless entry module, and it'll need to be diagnosed and repaired accordingly.
there is a terminal block under bonnet on right hand side attach battery charger to it until key fob works
How do you program a key fob to a 2003 Chevy Malibu
how to reset remote key fob for Mercedes SL 320
Not sure what fob is! But for the key, you need to approach the Mercedes Benz dealership. For the C240, 2002 model, I had to pay around $250 for a new key. It can open and close the door from around a block, so take care that you don't accidently open your car while handling your keys!