it all depends on what size the wash is. They all have there dimensions printed somewhere outside of the wash. mine is a 310 L2 and i have put mine through several.
I use an IMO car wash and i have 280 swb with roof rails and its fine, sh*t myself first time tho as the worker said it was my call and he had never seen a convertible transit custom lol
cheers chaps, i will give it a shot then. Mines had a roof rack fitted for the last couple of years which has now been removed, so the roof is minging, don't fancy trying to scrub it manually so car wash it is !!