There are some AWD cars where the variance between wheel rotation can be enough to make the nannies mad if you have a big difference in diameter. I think Subarus are one of the offenders, if I recall.
I don’t think the W163 MLs care - it’s more of a mechanical system than electronic, so while wheel/tire rotation is monitored, I don’t think it affects anything as far as nannies are concerned. When I got my former ML500 the right rear tire was really bad from a wear standpoint, I never figured out why. I thought it might have had a bad bearing, but if it did someone had fixed it. My tire guy didn’t care about one tire. He agreed the other three were in excellent shape and had little wear. -D > On May 13, 2022, at 11:19 AM, Allan Streib via Mercedes > <mercedes@okiebenz.com> wrote: > > A potential problem with 4WD/AWD vehicles is that some shops will refuse to > install less than 4 new tires. They claim that there's enough difference in > diameter on the old tires, either due to wear or because different brands are > slightly different. > > I'm 50:50 on whether it's a scam. I'd say replacing a fairly new tire with > one of the same brand and size should be OK. And AWD normally only engages if > the drive wheels are turning faster than the free wheels (i.e. slipping), so > as long as the new tires are on the drive wheels it should generally be OK? > 4WD should only be used on loose/slippery surfaces so it should not be an > issue either. > > And there's no way that the donut spare most cars come with is going to be > exactly the same diameter as the full-service tires but for some reason > that's not a problem? > > Allan > > >> On Fri, May 13, 2022, at 1:07 PM, dan penoff.com via Mercedes wrote: >> It still drives/rides like a truck, I’ll bet. But good tires (weird >> size, limited offerings) do make a difference. >> >> My former ML had Kumhos or some Asian brand. Luckily, my tire guy could >> get them as I only needed one when I got it. >> >> I need to look at what’s on the 2003 ML350. They’re in good shape, but >> never noticed the brand. >> >> -D >> >>>> On May 13, 2022, at 10:46 AM, Buggered Benzmail via Mercedes >>>> <mercedes@okiebenz.com> wrote: >>> >>> For the 05ML500 >>> >>> I ordered a set of Kumho Krugen tires from Amazon in the right size (they >>> are not real common) and got them installed today. The old ones were like >>> 8yo, Lizetti was the brand, cheap but seemed decent. LF started shaking >>> like crazy, I thought it had loosed a belt but turned out it had thrown a >>> weight and needed 6oz according to the tire shop. I asked them to check it >>> out. Anyway it was time to get new tires. Doubled my investment in the >>> vehicle! >>> >>> Driving home from the shop I can’t believe what a difference. Better ride, >>> handling and much quieter even on the beattohell interstate. I was thinking >>> on the way up there how rough this thing rides even accounting for the >>> imbalance. Transformed. Pretty amazing. >>> >>> --FT >>> Sent from iFōn >>> _______________________________________ >>> http://www.okiebenz.com >>> >>> To search list archives http://www.okiebenz.com/archive/ >>> >>> To Unsubscribe or change delivery options go to: >>> http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com >>> >> _______________________________________ >> http://www.okiebenz.com >> >> To search list archives http://www.okiebenz.com/archive/ >> >> To Unsubscribe or change delivery options go to: >> http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > > _______________________________________ > http://www.okiebenz.com > > To search list archives http://www.okiebenz.com/archive/ > > To Unsubscribe or change delivery options go to: > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > _______________________________________ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
