17s?
Member
Joined: May 2010
Posts: 218
Likes: 0
03 E320, 03 Lexus RX300
the E class (07+) as well as AMGs came with 18s from the factory...the suspension is designed to work with them. If you run a 40 series tire, and are careful about big potholes and such, you won't pop tires or bend/crack rims. The ride quality from a 245/45/17 to a 245/40/18 will not be THAT much different, and you won't even have to recalibrate your speedo as it's less than 1% larger in diameter.
go to 1010tires.com and use their tire size calculator to make sure your new wheel/tire combo is the right size. To avoid recalibrating the speedo, you want to stay within 3% of your stock tire size. 4matic cars should use IDENTICAL tire sizes all around to avoid screwing with the all wheel drive system (different diamters = different rotational speeds = crunch crunch grind grind)
go to 1010tires.com and use their tire size calculator to make sure your new wheel/tire combo is the right size. To avoid recalibrating the speedo, you want to stay within 3% of your stock tire size. 4matic cars should use IDENTICAL tire sizes all around to avoid screwing with the all wheel drive system (different diamters = different rotational speeds = crunch crunch grind grind)
Senior Member
Joined: Aug 2011
Posts: 356
Likes: 19
From: RI
2017 S550 4matic
w219 cls also. However even the 4matic cars and obviously AMG cars have come with 18s. It's not like a fiesta that comes stock with 15s that you're going to throw 20s on it, if you're only going +1 or +2 you don't need to worry much as you can compensate for the diameter in the sidewall of the tire.
