I see lots of cars where the seller states always maintained , non smoker , garage kept , never driven in winter, oil changed with synthetic every 3,000 miles. . . . but the seller has no way to back up the claims, it's all hype.

I looked at a SL that the seller stated garaged / never driven in snow but the under hood was heavily corroded. With some prodding, the seller admitted " HE " never drove it in snow during the 1 year he owned it.

In more moneyed parts of the US, I suspect most MB are lease cars for the first 4 years and likely the next 4. " Owners " of these cars aren't going to park them in the winter, they leased them knowing they will get turned in after 4 years and another one will show up on their doorstep.

Is he the original owner?

Does he have all of the service records back to new?

Can he prove garage kept for it's entire life ?

Snow isn't the problem , it is the salt. If never driven in winter salt, all of the under hood aluminum should be free of corrosion / white blotches and the engine block paint should be intact with zero rust. If the car was never driven in snow, but driven on wet or dry salty roads, saying never in snow is technically correct but miss leading.

Think about this. Grandma does not drive when snow is on the roads but will drive then the snow has melted. This allows salt to collect under the car. In summer, the car isn't driven in the rain to wash off the salt, this leads to corrosion even in the middle of summer as the salt continues to pull moisture out of the air

All of the suspension paint should look intact and there should be zero signs of even the slightest rust on sharp edges.