Thanx for everyone's feedback....the Klann tool is awesome and worth every penny!! (as opposed to the OEM tool).
Simple to use and not even needed on the rears...just 3 bolts to undo and the lower arm just falls away with the spring.
2 guys did all 4 500E springs in about an hour with floor jacks and hand tools. So easy that I'm thinking of getting the whole range of spring pads and playing with the ride heights.