please help... i've got a l322 53-plate. one of the original keys stopped working a while ago. i was informed it was "dead" and shelled out £175-00 for a new one. the mechanic did the magic shut-door/key in ignition/pull out/press this and that etc to "programme" it......NOTHING HAPPENED!. i'm reluctant to go to main dealer as don't want the huge estimated cost.... can someone on here help please?. the doors lock and unlock via the key but won't work remotely.