Thanks this is good info. I did look do some checking yesterday before posting here, but all the articles I saw only discussed the stock E55 AMG of 469hp, nothing about modified and I didn't find anything out about the diff. only the aftermarket options popped up also. Will check out the forum over on MBWorld.

I'm going to look at the car on Thursday. If it's too loud or rides too bumpy then I'm going to pass on it.

__________________
'66 VW Bus (Fuel Injecter'd, disk brakes, airbags susp., IRS, CLK rims)
'12 Chevy Colorado Crew 3.7 I-5