Ah good info. I thought all the 190's had a single mass and w124 got the dual mass though. If they are different will they mount to the crank the same?

The reason we want this spare is that it is cheap and we don't want the downtime rebuilding the transmission will create. We are going to run this in a few endurance races which is a tight season with work and if it happens to fail in a race we aren't going to be rebuilding anything in the pits. If this transmission gets significantly worse and we have time to rebuild it we will.