Short answer: no.
Long answer: you won't be changing the diameter of the wheel, just
the amount of rubber (less) and metal (more). You have several options
in tire size there is no single right answer. Just make sure the
new size is withing 2% of the number of revolutions per mile
Here's a handy dandy calculator I wrote:
One thing, if it were me I'd go to 16" not 17". There is
a penalty in terms of stiffness of ride and comfort and
wide-ass 16" are enough to give you that HOLY SHIT slot
car handling. 17's in my opinion aren't THAT much better
and he ride is pretty severe. But that's a subjective
thing and YMMV.
Need Mercedes parts? http://parts.mbz.org
Richard Sexton | Mercedes stuff: http://mbz.org
While there may be truth to the rumor that there is a penalty to skip the
16s and go directly to 17s, that's exactly what I did on my 325i (and later
my 325iC), and I found no penalty at all. I do mostly freeway driving, and I
found no practical difference in the 15s and the 17s, except that the 17s
are alot cheaper.
I see no reason to go to 16s, make the jump all of the way to 17s if you are
going to make the jump at all.
The 3 Series cars work fine with a 225/45x17. The tires fit well, and the
speedo is dead nuts accurate at 80+ mph.
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