Sorry to resurrect an old thread, but just wondering if you got this sorted Alison? I hooked up to a caravan for the first time yesterday since getting a removable towbar fitted by PF Jones and the trailer assist menu didn’t appear. I just kept getting error messages every couple of minutes whilst driving. I also can’t see Trailer Assist in the menu?
Edit - just been looking through my paperwork and it looks like Trailer Assist was an optional extra which we didn’t select (not having any real plans at that time for towing - we only really specced towbar prep in case I ever wanted to fit a bike rack). So that would explain why it isn’t there! Still not sure why I’m getting bleeped at every 30 seconds with error messages though. Will have to investigate further……