Torque on lug nuts?
Thread Starter
Newbie
Joined: Dec 2008
Posts: 5
Likes: 0
S500
Torque on lug nuts?
Hello! i purchased a set of Lowenhart's for my 2002 S500 and was wondering what I should set my Torque wrench at? Any additional information on changing wheels would be appreciated. I read a post about not having key in so airmatic wont try compensate. Anything other concerns? Thank you!
Member
Joined: Jul 2007
Posts: 139
Likes: 0
From: Roswell, GA
CL500 and ML55
Senior Member
Joined: Nov 2004
Posts: 431
Likes: 1
From: Midwest USA
2004 S500 & 2011 Mini JCW
Tell me why 90 lbs. of torque would save brakes vs. 110 lbs. ? It's always been common sense that your brakes would warp if your lug nuts were not torqued evenly, but not sure about the torque amount. I open for enlightenment.
Trending Topics
MB World Stories
The Best of Mercedes & AMG
7 Craziest Things AMG Gas Ever Built
Verdad Gallardo
New Electric Mercedes-AMG GT 4-Door Coupe Unveiled: 10 Things You Need to Know
Verdad Gallardo
6 Mercedes Models That Did NOT Age Well (But Are Somehow Still Cool)
Verdad Gallardo
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun
Verdad Gallardo
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Verdad Gallardo
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine
Verdad Gallardo
Flawlessly Restored Mercedes 190E Evo II Heads to Auction
Verdad Gallardo
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know
Verdad Gallardo
Mercedes EQS Gets A Major Update: Everything You Need to Know
Verdad Gallardo
MBWorld Fanatic!
Joined: Sep 2005
Posts: 2,098
Likes: 0
From: Lawrence, KS (USA)
S500/W220/2000
MBWorld Fanatic!
Joined: Jan 2008
Posts: 6,151
Likes: 533
Mercedes
110lbs shouldnt be overtorquing though...just dont go any tighter!
100-110 is fine.
Newbie
Joined: May 2015
Posts: 1
Likes: 0
2000 S430
I don't know why Mercedes says the torque should be 110ft lbs. when the maximum torque rating for the bolt itself is 104ft lbs per the hardware manufacturers. I have had to replace all of my lug bolts twice because they were breaking at 110. I agree with 90-95ft lbs. I have been running that torque for 5 years and 30k miles with no issues at all.
Senior Member
Joined: Dec 2014
Posts: 448
Likes: 3
From: CALIFORNIA, UNITED STATES
2003 S430, 2014 E350
110 ft lbs OR 150 nm for the non USAs. I have seen many shops overtorque the bolts. They get their impact driver out and just punch the nut all the way in. Under torque and your wheel will fall off. Over torque and you risk damage to the nuts and threads , maybe even crack the wheel? I tighten my bolts by hand (with a cheater bar) and I get very close to 110 ft lbs, usually lower at like 100 ft lbs.
Most cars are 100 ft lbs.
Most cars are 100 ft lbs.
Senior Member
Joined: Apr 2018
Posts: 480
Likes: 30
skoda octavia MkII 2.0
I think that that equates to 48 kg so it's about 500nm.
But I will check that because now I am curious. Does it need to be adjusted after X miles?
My SA didn't even know that the diferencial oil must be changed after 3000km. When I request a formal answer stating that it is not need he just replied with a schedule for changing the oil...
But I will check that because now I am curious. Does it need to be adjusted after X miles?
My SA didn't even know that the diferencial oil must be changed after 3000km. When I request a formal answer stating that it is not need he just replied with a schedule for changing the oil...
Senior Member
Joined: Apr 2019
Posts: 428
Likes: 96
From: Houston
001 s600, 94 sl600
Wheel lug tightenikng torque IS important. MBZ specified the wheel lug tightening torque high enough to ensure there is no flexing between the hub and wheels or between lug nut and wheel. Any flexing in those areas will lead to fretting corrosion and fatigue cracking and wheel failure. ANOTHER important FACT is dirt.scale. trash between the hub and wheel can and will lead to brake rotor warping. In my over 50 years of owning, driving, and maintaining my autos , having warped brake rotors has never happened. My 1971 Chevy Vega once developed SEVERE front brake chattering when wheel bearing overgrease contaminated the rotors during a long trip from Houston, Tx to Petersburg, Va. Issue did self resolve in about 500 miles on IH 95.
Pls follow MBZ Owners Manual torque specifications, UNLESS non OEM wheels are substituted and specify different torque values. Consistent cleaning of hub and wheel mating surfaces AND uniform 3-pass tightening (just barely snug,, 50%, 100%) will eleminate most ALL rotor warping. Hard braking (real hot rotors) followed by cold water splashing and immediate parking is really very hard on rotors and will cause warping on some cars.
Pls follow MBZ Owners Manual torque specifications, UNLESS non OEM wheels are substituted and specify different torque values. Consistent cleaning of hub and wheel mating surfaces AND uniform 3-pass tightening (just barely snug,, 50%, 100%) will eleminate most ALL rotor warping. Hard braking (real hot rotors) followed by cold water splashing and immediate parking is really very hard on rotors and will cause warping on some cars.
