I have the original alloy 14" rims that came with my 1983 300sd. My tires are limited to 195/70/14H. Since my tires are down to 4/32" tread I am thinking if this would be a good time to change rim size as well. I was thinking 225/60/15H. I do not know if the difference is worth it and if I would have to look for 15" MB rims to fit the bolts. The car drives fine but the filment for tires is getting harder every 10 years. Anyone make this change to their 126 and was it worth it?