From memory they are 7"x15.35"
From math, they are 6.5"x15.35" et22.
I know w107 and w126 and w108 14" wheels are 6.5x14 et30. So these wheels would sit about 8mm farther out than stock 14" wheels. When MB went to 15" wheels on the r107 and w126, they were 7x15 et25 (or the earlier optional 7x15 et23 bundts (available as an option for w123 too I believe). Later (1990+) w126 got 6.5x15 et21.5 wheels.
So if you like a narrow stance, then stick with the 14" wheels, but if looking for a slight upgrade, like the same one offered by MB for this era of car, I think these wheels would work well.
But if you don't like them, you don't like them. I just doubt you are going to get more than $200 USD for the full set though. My bet is that you'd be lucky to find someone to give you that much, at least here in the US. That's just my opinion though. I could be wrong, and I don't know the European TRX market.
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