Originally Posted by
04Fire
As far as the material upgrades go.... basically MB found that too many people were still using dino oil in there new engines and a lot of the small oil passages were getting clogged with sludge as people were going 7-10k between oil changes on dino oil... as well as a few other things like the crank shaft seals going bad prematurely, etc.
Interesting, the Star EPC doesn't list differences between 03 and 06 SL500's... My understanding is the 320 crossfire engines are the same as well up to 2007, when Jim just found out they changed the crank bolt pattern for the flywheel/flexplate. I'll do more digging in EPC and see what I come up with.