Comparing toyotas troubles to mercedes is hardly fair, toyota has yet to get much of anything right. If it was such a a small change in fuel quality they would be having problems in other parts of the world from abusive behaivors. And i would suspect that people have problems with rod bending that dont beat on their cars and i dont think any of us will dis-agree that during fuel throttle operation cylinder pressures are much higher. It just seems to me that cylinder pressures from changes in fuel quality or injection timing are not the main cause of the problem, but rather a function of sustained high rpm loading. I could be totally wrong but i really think the parameters you are adressing are really miniscule when you take into account what is experienced under normal combustion events. Im not trying to be arguementative i just dont agree.

__________________
1996 s10 zr2 with a 6.5 turbo diesel
1996 c2500 suburban with a 6.5 turbo diesel
1981 300sd with a turbo 617
Monte carlo figure 8 car