The power pulses on a diesel are much rougher, so I suppose the diesel disc has different springs in the disc to compensate for the differerent movements caused by the power pulses.

I saved a hundred dollars or so by using a cheap clutch disc on my car with a oe pp. It shudders. I would not recommend doing the same. The tranny is too much trouble to pull and replace a disc which you saved a hundred or so on.

Just me.

Oh, and the only clutch failure I have ever had on a benz was a 250K mile oe clutch on a 240d which failed by the little springs breaking.

__________________
[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.