Correct wheel tightening procedure to avoid warped brake discs?

[BfgSLKMan]

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:

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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?

 

[OneForTheRoad]

Interesting to know how the discs can move ,once the disc location screw has been fitted and tightened?? Theoretically the wheel bolts shouldn't have any effect on disc placement.

Disc warping mainly occurs due to the mating surface of the Hub not being cleaned and as the Germans above quote " POLISHED" to a very high standard. This is the main reason the discs don't sit correctly,

I've yet to see a fitting centre after putting tyres on ,torque a wheel on in 3 stages like that ,and tell you " it's to avoid brake disc warping."