All modern MB use 5x112mm bolt pattern (if I remember correctly).
Your 300SD has an offset of something like 23mm. You may go safely +/- 10mm.
I upgraded to 16"x7" 35mm offset. I run 225/60-16 tires. No rubbing. I had to add a small 5mm spacer in front to clear the dust cap center.
With these wheels I needed the shorter wheel lugs.