W124 wheel offset is 35mm...that is just as important as tire width.

Make sure the S-class wheels you've procured have the same offset...should be embossed on the inside of the rims...

__________________
2009 ML350 (106K) - Family vehicle
2001 CLK430 Cabriolet (80K) - Wife's car
2005 BMW 645CI (138K) - My daily driver
2016 Mustang (32K) - Daughter's car