Will...You didn't do anything WRONG! Look back at what I first posted.

Those rotors were just poor castings. I owned over 20 MB's & never had a warped rotor! EVEN on my racecar! Even in the rain at 140mph!

But that darn Toyota tow truck warpes them all of the time.

You can have then turned (trued) & hopefully the problem won't come back.

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MERCEDES Benz Master Guild Technician (6 TIMES)
ASE Master Technician
Mercedes Benz Star Technician (2 times)
44 years foreign automotive repair
27 Years M.B. Shop foreman (dealer)
MB technical information Specialist (15 years)
190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
Retired Moderator