As far as the oil....it has not been changed since I have owned it. And since it was bought new by my father, I doubt it has ever been changed, maaaayyybe once. So although the oil is without a doubt old, I'm confident that it's correct. Will just old oil cause the limited slip to quit working? Assuming the answer to that question is yes, could it actually cause damage? Or will a fluid change perhaps cure the problem?
'86 420SE Euro
904 Midnight Blue, Gray Velour
Dad bought it new, now I own it.
"A Mercedes-Benz is like a fine wine, it only gets better with age."