The 112 is the bolt patern. 5 x 112 is usually how it is stated. It's common benz pattern. The offsett is usually stated as "ET" A usual spot is an inner spoke. Check the insides of the wheel spokes for "ET 35". I'm sure they are fine.
Is this the reason you think you need spacers?? The only reason I can see you needing spacers was if your front/rear calipers where rubbing on the inner face of the wheel. The spacer would bring the wheel farther away from the hub = more space for say bigger brakes.
If the wheels are mounted with no rubbing of the outer fender lip/inner fender or calipers I would say your all set!!