I have 19" aftermarket wheels with low profile tires on my E550 cabriolet and I just discovered the front right wheel has a crack. I am in Ohio and leaving for Florida for the winter on Sunday and it will take 10 days to get another wheel in. I was thinking of putting on one of the front OEM 18" wheels on the car to make the trip to Florida. The OEM tires are 25.4" (235/40/18) and the aftermarket tires are 25.5" (235/35/19). Opinions?

 

The tiny difference in diameter will not cause any issues.

 

Yeah, the diameter is probably very similar, so that wouldn't likely be an issue.

But what about the difference in unspring weight from right to left? I'm not asserting that it would matter (just raising the question).

Whatever you end up doing, I'd make sure that your OEM tires aren't too old!