I have a friend from the Third World who tells me that an important part of any DIY brake job there is to put the car up on jackstands, start it and put it in gear, and go over the rotors with a sanding block (DO NOT DO THIS!).

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86 560SL
With homebrew first gear start!
85 380SL
Daily Driver Project

http://juliepalooza.8m.com/sl/mercedes.htm