UKPassats

Hi, today my Central locking packed up, turned to the trusty Haynes manual which says " in the event of a system fault first check that the fuse S7 is in good condition and securely connected before removing any part of the system" My problem is I cannot locate fuse S7 because it is not in the fuse box. I quite naturally want to check this out first as I believe it could be the Bi-pressure pump that has failed. I should be grateful of any help
Thanks Robert