Considering putting them on my '84 300SD. Has anyone ever put 235/50-16 tires on a 126? Did they fit into the tirewell and how did they affect the ride and handling of the car? Thanks.

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1999 Mercedes-Benz S600, 103K miles - garage queen
1988 Mercedes-Benz 560SEL, 89K miles - daily driver
2007 Hyundai Sonata Limited, 31K - daily driver

They probably will be to wide. The 225/55/16's I have on the SDL now, seem to be as wide as you can go without spacers. I am also running 7.5in wide rims I tried a set of 8in wide rims with the same size tires and they wouldn't fit without spacers.

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1999 SL500
1969 280SE
2023 Ram 1500
2007 Tiara 3200

Thanks for your response. I currently have 225/55-16 tires on the car now and they are awesome. It's just that, I drive my BMW X5 all day long to run errands since it has much better passing power and excellent handling for me to jump around in traffic. Then in the evening when it's time to go out and I swap the BMW for the 300SD, I start to feel like the 300SD should get even beefier tires for better traction. But I really need to let that go. LOL

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1999 Mercedes-Benz S600, 103K miles - garage queen
1988 Mercedes-Benz 560SEL, 89K miles - daily driver
2007 Hyundai Sonata Limited, 31K - daily driver

Ok my SDL can not even brake the tires lose. You don't need anything bigger than a good 225 tire on these cars. I don't think their is room anyway.

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1999 SL500
1969 280SE
2023 Ram 1500
2007 Tiara 3200

You should be ok with the 235/50 if your wheel offset is ET25 or higher. I ran 245/45-16 on my W126 on 8" rim with ET20 without any rubbing. Having said that I would think installing higher performance tires in 225/55 size will give you the performance you are looking for. Personally I am running 225/50-16 Yokohama ES100 with good results.