ReddZedd

I was wondering the maximum width tire I could fit my W208 CLK with (staggered), without any rubbing in the fenders.

KJI3jflarryfe93

i'm using 255 continentals in the rear on my c43 without issues.
your clk is a w202.

some tires will rub others won't.

don't go to wide as you don't know if it will rub or not?

sick430

265 no problem

Chappy

265-35-18 easy (rears), depending on wheel offset and suspension setup. My ET25 rubbed slightly in rear but the Monoblock II did not.

I have used 235-40-18 in front and now use 225-40-18 Michelin Pilot SS.

HPDECLK55

235/265/19s on mine, lowered, with no problems at all.

ProjectC55

I think Improviz had 275s on his

Ahmed

I know this is old but still thought it might come in handy for those that are still wondering.
Wheels are AMG Monoblock Type 2 in 18" (Standard on W210 E55 AMG)
My wheels were factory-fitted from MB.

I upgraded my tire sizes from
Front: 225/40 to 235/40
Rear: 255/35 to 265/35
Tire Brand: Hankook Ventus V12 Evo2

I also installed 12mm spacers from H&R at the rear only.
As a preventative maintenance issue, I also replaced the front lower control arms.
And installed camber bolts for wheel alignment purposes.

All good, no rubbing on the fronts at full lock. Rides great and firm.