The suspension design is from the 1968 220D! You can't expect much from a rubber mounted front end with only 3.5deg of caster on a 3500lb + car.
I thought the 560sl's had a different fron suspension than the previous 107s?
'90 300SE 298k
-300K and it gets put into retirement.
'80 300D 255k Purchased new by family in 1980.
1973 220 (gas)