I too will be shocked if it is limited slip. If the tag were gone you could tell by raising both rear wheels and turning one wheel. If the other wheel turns in the same direction it's a limited slip, if it turns in the opposite direction, it is standard spider gears.

Good luck,

------------------
Larry Bible
'01 C Class, Six Speed
'84 Euro 240D, 523K miles
'88 300E 5 Speed
'81 300D Daughter's Car
Over 800,000 miles in
Mercedes automobiles