Thanks all for your replies.
Everyone is a winner.
Jack stands under the shock support plates is what I like to do as the car is more sturdy.
Gives me the road stance position for the lines and everything.
Indeed the calipers were installed incorrectly, king pins are worn out (drivers was replaced at one time), no grease in them, cotter pins missing.
Various washers, spacers, connectors missing. Loose connections.
Big one is the calipers were rebuilt by a nincompoop, and lost three of the eight bolts holding the halves together.
And replaced with two that are too long and third gone altogether.
Horns were also boken off at the tabs and only one was installed-a cheapo meek one.
Now all the work has been corrected and horns installed onto the front cross member straps(not drilled but clamped).
Now onto the rest of the car.
Walter
1967 220SL-diesel
1970 280SL-undergoing restoration