hi my mondeo "y " reg bonnet would not open , i was told by a good friend this is a common fault on the mondeo and focus , due to rain water being able to get into the lock, i was told to drill out the lock using a 5 mm hss bit , going only as far as the length of the key itself,, this cuts off the pins inside the lock then can be opened using the / or any key as you cant tell when the ford badge is put back (dont think i,ll ever bother spending £80+ on new lock from dealers).
this worked perfectly for me took less than 5 mins , hope this helps
vauxhallmad
October 2008