I know they have been fitted with 35mm offset here in Denmark.
I've got 15x7's ET35 on my up!, and I've just checked the clearance. Rear fitment of 7,5x16 ET38 is no problem, but I'm afraid that they won't be able to clear the front struts without (2-3 mm) spacers.
mkay, the rims are ET 38 now, but i need to use adapters, so may need to take down ofsett to 28 or 25 and then use a 10mm adapter Depends on how thick the rims are! But 7.5 fits up front with et35!? what UP! have these rims!? have not seen it on vagcars.dk