Took the old girl in for Mot today and passed with flying colours

Also treat her with some Mobil 1 and a new set of RS29 front brake pads,
Got a problem with the ratchet system on the drivers seat, the wife had been out in it and put the seat right up, now it won't go down

handle doesn't move ? The garage took my seat out today and couldn't see the problem ? They ordering a couple of parts to see if it sorts it out ?