Correct wheel tightening procedure to avoid warped brake discs?
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Joined: Jun 2018
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From: Northern Germany and sometimes Southern Germany
Mercedes E220d AMG Line Estate (S213) and Mercedes E220d AMG Line Cabriolet (A238)
Correct wheel tightening procedure to avoid warped brake discs?
So - as we know there has been extensive commmentary on this fourm about premature brake disc warping on a variety of current MB platforms. By chance I stumbled on this video (linked via my YouTube channel) whcih explains the Mercedes Benz specified way to tighten wheel nuts/change brake discs:
Yes - it is in German but with English subtitles. Key chapter starts at 3'15"
In sum, with the wheel not underload tighten to 20Nm, then to 75Nm and then put the weight of the car on the ground and tighten to 150Nm (or the specified torque if different). The reason for this is all to do with how the disc sits in the grove of the bearing hub. As someone about to replace front discs again I shall use this method and report back, but I suspect this will not be well known in repair shops?
Yes - it is in German but with English subtitles. Key chapter starts at 3'15"
In sum, with the wheel not underload tighten to 20Nm, then to 75Nm and then put the weight of the car on the ground and tighten to 150Nm (or the specified torque if different). The reason for this is all to do with how the disc sits in the grove of the bearing hub. As someone about to replace front discs again I shall use this method and report back, but I suspect this will not be well known in repair shops?
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Joined: Sep 2018
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From: New Orleans Area
2015 E400 Sedan
I just run a few (2-3) lugs snug with tire off ground to hold wheel to hub.
Then snug all of them in star pattern with impact to first impact blow or 2
then lower wheel to ground where tire just starts to take some weight - basically enough so it doesn't spin on ground when trying to torque.
Then use torque wrench in star pattern and tighten to final torque value.
Then snug all of them in star pattern with impact to first impact blow or 2
then lower wheel to ground where tire just starts to take some weight - basically enough so it doesn't spin on ground when trying to torque.
Then use torque wrench in star pattern and tighten to final torque value.
MBWorld God!
Joined: Dec 2019
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Likes: 6,177
I just run a few (2-3) lugs snug with tire off ground to hold wheel to hub.
Then snug all of them in star pattern with impact to first impact blow or 2
then lower wheel to ground where tire just starts to take some weight - basically enough so it doesn't spin on ground when trying to torque.
Then use torque wrench in star pattern and tighten to final torque value.
Then snug all of them in star pattern with impact to first impact blow or 2
then lower wheel to ground where tire just starts to take some weight - basically enough so it doesn't spin on ground when trying to torque.
Then use torque wrench in star pattern and tighten to final torque value.
Newbie
Joined: Jul 2023
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e300 hybrid
Did it work for you
Hi, Did you ever try this and did it work for you.
I'm on my second new set of disks on the front, terrible warp after about 1,500kms.
I don't want to throw more money at them unless this approach actually works.
Thanks in advance.
I'm on my second new set of disks on the front, terrible warp after about 1,500kms.
I don't want to throw more money at them unless this approach actually works.
Thanks in advance.
So - as we know there has been extensive commmentary on this fourm about premature brake disc warping on a variety of current MB platforms. By chance I stumbled on this video (linked via my YouTube channel) whcih explains the Mercedes Benz specified way to tighten wheel nuts/change brake discs:
https://www.youtube.com/watch?v=9R0Q...=1&pp=gAQBiAQB
Yes - it is in German but with English subtitles. Key chapter starts at 3'15"
In sum, with the wheel not underload tighten to 20Nm, then to 75Nm and then put the weight of the car on the ground and tighten to 150Nm (or the specified torque if different). The reason for this is all to do with how the disc sits in the grove of the bearing hub. As someone about to replace front discs again I shall use this method and report back, but I suspect this will not be well known in repair shops?
https://www.youtube.com/watch?v=9R0Q...=1&pp=gAQBiAQB
Yes - it is in German but with English subtitles. Key chapter starts at 3'15"
In sum, with the wheel not underload tighten to 20Nm, then to 75Nm and then put the weight of the car on the ground and tighten to 150Nm (or the specified torque if different). The reason for this is all to do with how the disc sits in the grove of the bearing hub. As someone about to replace front discs again I shall use this method and report back, but I suspect this will not be well known in repair shops?
