Key fob reprogramming

A&Q about 350Z
Q:

i need to get a keyfob reprogrammed for my dads eclass merc, any ideas where i can have this done in the manchester area?, and what might he expect to pay?
A:

Got any more info, year engine etc. Theirs some stuff on autodata but it varys with age.
A:

its a 98 E300 DT thats about as much as i know, only bought it about 3 days ago, have 1 key that works, and one that lights up but does nothing!
A:

Looks like dealer will have to do it,
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