Craig,
The man in Colorado put in a 3:07 out of another MB. He wasn't on MercedeShop or any other site I know of. I had heard of the car and owner through word of mouth and had to ask someone else to forward my message to him as a shot in the dark. He responded with the gear, etc and info with times etc.

The rear diff I have you won't find in a MB salvage yard as it is not from a Benz, but a 92 Ford T'bird! It is what is commonly called a Ford 8.8 and many ratios are available and a variety of ltd slips as Detroit locker, Auburn, Dana etc. These are either clutch type, ratchet or gear depending on use. Overall the gear or Auburn or Quaife are best and most expensive. I've put a similar one from a ZR1 Corvette into my 190 and this is not much different.

And yes, altitude makes a huge difference...ever go snow skiing and feel the thin air effect on you? Same for a motor!

Tobias MB
4 MBs