If you want a stock ride height then I'd try standard springs with the appropriate shim height. You might have to fiddle about with the rubber shims to get it right though.

I don't know for sure but I assume if you've got SLS on a 560SEC you don't have the anti-dive set up as well? It is probably worth a quick look in the FSM for the approved spring / shim / shock combinations to see if there's a difference in uncompressed spring length between the three systems.

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1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!