Anyone use spring shims to level out a leaning car?

My 300SD is about a half-inch lower on the DS. I thought about new springs...but a shim is more certain to level it out (no guarantee new springs will level it) and are cheaper/easier.

http://mercedes.thebenzbin.com/

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2009 VW TDI Jetta Sportwagon 172k miles (rear-ended harder than Elton John on 8/4/13. Total loss)

1991 Volvo 240 142k miles (T-boned by a stop sign runner. Total loss)