Ok thanks for the info.I have tried different locksmiths but they say they can't do the Chrysler300 for reasons I don't understand but have been in touch with my local Chrysler dealer and they can Re- sync for £80.00 inc vat.
2007 Chrysler300c I have two remote keys (two button) for my Chrysler and have just had one refurbished so this one needs to be re-synchronised. Can this be a DIY job or will it have to go to a dealer?