Can you post a picture of your car. I have a 98 E320 and looking to add monoblocks also. I was thinking 17's wheels but looks like 18's are more popular.
It would depend on the size of your rim, and it seems to me that the rims are off a w124 which didn't take anything larger than 17' (without modification) so i don't see any problems with your switch as long as what i guessed from your post was right.
good luck.
PS: The best person i can think of for getting advice on this forum regarding W210s is a guy called "E-Klasse". Try sending him a PM.
Vehicle: E320, SLK320, MKV Jetta TDI, Mini Cooper S
Location: Arizona
Posts: 1,678
RE: will ET 35 offset fit E-Klass
Sorry to jump in so late, ET35 should be fine. it depends on the width of the rim too. I have 18x9 ET35 in the back and 18X8 ET31 in front. I have had 16x7 ET37 on my car before with out any problems.
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sorry for the late respos i don't check the forum on a regular basis.
i hope this helps,i have 18x8 et 35 monoblock replicas with 245/40/18 sumitomo tires.the look and ride is great but the front tires rub if i hit a big bump.if your fenders are rolled you will be fine,if not just go down a size in the front.
as far as a picture i will see what i can do(no digital camera)...FYI i got the rims at www.bekkers.com and the tires from tire rack,whole setup cost me around $1100 which i thought was pretty cheap.
Vehicle: E320, SLK320, MKV Jetta TDI, Mini Cooper S
Location: Arizona
Posts: 1,678
RE: will ET 35 offset fit E-Klass
I think 245/40/18 is the stock E55 size for the front. On a standard E-Class you will want to go with a 235 or even a 225 in the front to keep them from rubbing.