WTF?! Can’t break wheels bolts loose!
Thread Starter
Senior Member
Joined: Nov 2023
Posts: 267
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From: Virginia Beach
R231 SL 63
WTF?! Can’t break wheels bolts loose!
I’m changing pads and rotors on the rear of the SL 63. The driver’s side was easy… I broke the bolts loose with my breaker bar. Replaced the pads and rotor and torqued to spec. Easy.
I moved to the passenger get side and cannot break the wheel bolts loose. I hit with my air impact (granted it’s old but rated for 300 lbs ft) and did nothing. I then broke out the breaker bar. Nope! Nada. I was afraid I might break something.
How do I get these off without really ruining something?
TIA
I moved to the passenger get side and cannot break the wheel bolts loose. I hit with my air impact (granted it’s old but rated for 300 lbs ft) and did nothing. I then broke out the breaker bar. Nope! Nada. I was afraid I might break something.
How do I get these off without really ruining something?
TIA
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Joined: Oct 2019
Posts: 5,151
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From: Colorado
G550
Have you tried a 4-way lug wrench? You'll get more torque by pulling and pushing. Single arm breaker bars can be difficult to keep orthogonal on the bolt while applying pressure at the bar's end.
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Joined: Sep 2018
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From: New Orleans Area
2015 E400 Sedan
buy one of these beasts - over 1500in-lb 1,500 ft-lbs nut busting removal torq!
Milwaukee M18 FUEL 18V Lithium-Ion Brushless Cordless 1/2 in. Impact Wrench w/Friction Ring Kit w/One 5.0 Ah Battery and Bag 2967-21B - The Home Depot
Or Ryobi or other brands - Just make sure over1200in-lbs 1200 ft-lbs removal torq.
PS get IMPACT sockets or a life insurance policy because these impact guns can shatter normal sockets like a grenade
Milwaukee M18 FUEL 18V Lithium-Ion Brushless Cordless 1/2 in. Impact Wrench w/Friction Ring Kit w/One 5.0 Ah Battery and Bag 2967-21B - The Home Depot
Or Ryobi or other brands - Just make sure over
PS get IMPACT sockets or a life insurance policy because these impact guns can shatter normal sockets like a grenade
Last edited by ygmn; May 5, 2025 at 06:14 AM.
MBWorld Fanatic!
Joined: Oct 2019
Posts: 5,151
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From: Colorado
G550
1500 in-lbs = 125 ft-lbs -- OP says he's already used 300 ft-lbs with no success. Abusing the brakes is a method of last resort resort IMO. You could try a piece of pipe slipped over your breaker bar for more leverage. If a 4 way bar won't break them loose, ask a tire shop with pneumatic impact drivers to give it a try. When you get them out, if rust/corrosion is the problem, replace the bolts with a new set.
Last edited by streborx; May 5, 2025 at 05:59 AM.
MBWorld Fanatic!
Joined: Sep 2018
Posts: 3,242
Likes: 930
From: New Orleans Area
2015 E400 Sedan
My bad that was 1500 ft-lbs not in-lbs
(I was sizing a hydraulic motor for work earlier before I got online)
Try the electric impact gun - find friend with one or head to Tire store.
(I was sizing a hydraulic motor for work earlier before I got online)
Try the electric impact gun - find friend with one or head to Tire store.
MBWorld Fanatic!
Joined: Oct 2019
Posts: 5,151
Likes: 1,765
From: Colorado
G550
It's called "specification inflation". Imagine -- 24,000 inch-ounces held in the palm of your hand ! (lol)
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Senior Member
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From: Endless Mtns. PA
2014 E63 AMG wagon 1965 Austin-Healey 3000 1970 AMC AMX
Put the socket and breaker bar on a lug and have the bar on the ground in a position so that reverse will rotate the bar the correct direction and back-up slowly.
Joined: Nov 2016
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From: Maryland
2015 SL400 (M276 Turbo), 2014 C350 Sport (M276 NA), 2004 SL500 (M113), 2004 Audi TT225 (BEA)
depends on which side of the car you are on to determine going forward or back. Driver side (left) go backwards. Passenger side (right) go forward.
