I though I had read (here somewhere) that Mercedes didn't recommend turning the rotors, but replacing them?

BTW: I did the above-quoted 126 1st generation front brake swap on my 1985 300D KaliKar:

• New rotors
• New calipers
• New pads
• New bearings

...and except for the fact that I couldn't return my old 123 calipers for the core charge on the 126 calipers (understandable) I have been pleased.

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Mike Frederick
1986 300SDL, 240K+ miles
1985 300D KaliKar, 270K+ miles

The don't recommend against machining rotors, either. As long as rotors are within specifications as far as dimensions and run-out go, it can't reasonably matter how they got there.

Given that rotors aren't super expensive, I'd have them machined if they seem likely to be within the wear limits, or buy new ones if they seem questionable, have deep grooves, or you don't want to leave the car apart long enough to get the machining done. Machining locally costs about 1/2 what new rotors cost, which is a nice savings but not a huge one.

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1981 Mercedes 300TD, 1994 Honda Civic Del Sol
http://mefi.us/images/fuelly/smallsig-us/67195.pnghttp://mefi.us/images/fuelly/smallsig-us/103885.png

The problem with that approach is the fact that it's almost a certainty that the very low axial runout requirement necessary to prevent vibration on a fixed caliper system won't be maintained by the typical genius who runs a brake lathe.

Hm, that's a point.

I'm also curious about the W126 brake swap that's been mentioned here. Is there a link to a howto, or at least a description of what's involved?

EDIT: Never mind, there was a link right in the message that mentioned it. Duh.

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1981 Mercedes 300TD, 1994 Honda Civic Del Sol
http://mefi.us/images/fuelly/smallsig-us/67195.pnghttp://mefi.us/images/fuelly/smallsig-us/103885.png