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Go to Hollandar Listings of Mercedes Benz Wheels from Hollandar
Get rims for W 107,108,109, and 126 models with offset (ET) less than 25 for 15 inch rims, less than 23 for 16 inch rims, and less than 20 for 17 and 18 inch rims.
You can use rims with offsets higher than above by using hub-centric spacers
Do not use hub-centric spacers higher than 15 mm each, with 10mm a praticle max
Don't even try to use rims with ETs of 35 or higher for any size larger than 15 inch diameter.