I have changed all 5 belts on my 500SE in 30 minutes the tightening system om MB's makes it easy, And if the 560 SL balancer is the same as the Eoro 420 that's in my 500 and I would guess it is, then there are two notches on it that when lined up allow you to take the bottom bolt out of the water pump balancer in place.I sure am glad that I was raised in farm country where we learned to repair our own machines.
I am agast when I read some of the charges that shops inflick on MB owners that star on the hood must make them belive that we are all as rich as Texas oil men.
William Rogers..... ( poor but happy)