Staggered Tires, on sedans and some coupe need to have tires outside diameter to within 3/8 " of each other Example tirerack will give and some other dealers search engines
will make you put on tires as different as .9 inches.
Stay with .375. I'm going with 245 45 18 front dia.25.9
Rear 255 40 18 or 26.1 difference of .300 ".
Make sure your tire is larger always on rear.
I learned this from MBDOC

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1999 w140, quit voting to old, and to old to fight, a god damned veteran

??? not sure where you are getting the info but, it's kind of vague and we do not tell people that they need a tire that is 0.9" taller in the rear unless that is how the car is designed ... a Corvette comes to mind. Most of the MB product line has similar tire diameters front and rear. The staggered setups offer wider not taller rear tires

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Please, call me to place orders or for more info
use my name for on-line orders

hey Luke your tire engine does it.you have to be with in 3/8s. Also different brands are different height,just confirmed this morning
They differ as much as a inch. It not the search engines fault but the tire makers.Maybe they need ISO 2000 cert.

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1999 w140, quit voting to old, and to old to fight, a god damned veteran

if your are ordering staggered double check sizes,tire makers vary as much as one inch
Dont assume a 245 45 18 is all same size.

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1999 w140, quit voting to old, and to old to fight, a god damned veteran

well, I had hoped to be able to posted a follow up of my success but it wasn't to be.
in another post it stated that the MB traction control would reject rolling distance
difference if it was more than 3/8", and if the rear tire was smaller than the
front. the cruise control would disconnect as a result.

In my case, cruise control regularly shuts off at 70 mph

the rear tire's circumference is 79.5". the front tire's circumference is 78.5"

which means the rear tire is *larger* than the front by by 1.25%.

next step now will be to swap out the front tires with ones providing a 0% differential
and test the cruise control again.

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-- raymond~
47º 34'N 122º 18'W

can you convert that to diameter,surely there not 36 inches tall.

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1999 w140, quit voting to old, and to old to fight, a god damned veteran

I've found that diameter isn't as precise a measure as circumference, ie rolling distance.

to extract diameter, take the circumference and divide by pi 3.1415.

the 78.5 will return a diameter of 24.9". the 79.5 will return 25.3"

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-- raymond~
47º 34'N 122º 18'W

Dern for I was using 2.14 for pii.yes thats .025 over limit.You could just say heck with cruise,until you wear down your tire.

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1999 w140, quit voting to old, and to old to fight, a god damned veteran

exactly what i'm going to do. i'm going to get every penny out of the tire first.

what intrigued me was the explanation that the no-go should have kicked in only
if the rear was 3/8" smaller than the front. but in my case it was the other way
around. this explanation was tied to the rear wheel drive design.

oh well, at least we're documenting this for other readers to reference

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-- raymond~
47º 34'N 122º 18'W

I'm going with these diameters,26.1 front,and 26.0 rear.

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1999 w140, quit voting to old, and to old to fight, a god damned veteran

The vehicles suspension is tuned to having staggered tire sizes. Running the same tire size all-around will upset the vehicles handling and possibly lead to an over steer situation resulting in a severe accident and injury.

yes I no about over steer but I do straight line racing,drag racing a S Class can't corner,like a sl

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1999 w140, quit voting to old, and to old to fight, a god damned veteran

nOt exactly sure where you are getting the details but, it's type of unexplained and we do not tell individuals that they need a wheel that is 0.9" higher in the back unless that is how the car is developed ... a Corvettes comes to thoughts. Most of the MB products has identical wheel diameters front side and back. The staggered arrangements provide broader not higher back tires

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I got my info from MBDoc.he is good,I don't want problems with my cruise.Or worse ASR stopping my car.So thatn is why I carefully check tires for their diameter.The tire calculator points to keeping diameters close.

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1999 w140, quit voting to old, and to old to fight, a god damned veteran