There’s no mention of rust on the MOT history of this one either. In fact not so much as an advisory for the last 8 years which to be honest I find a little unusual for a 22 year old 180k miler W210
I guess it depends on who does the test and where, as I’m sure a decent inspection would find a few advisory items at the very least with that sort of mileage and age.
If nothing else you might expect to see the classic advisory of ‘undertrays/covers fitted’ to cover themselves (you can’t really check the sills properly unless you strip the plastic overs off...)
Regards rust - look at the under bonnet photo. It’s a very poor image taken in direct sunlight but you can see the inner wings have some kind of hammerite or stone chip stuff applied to them presumable due to corrosion. Likewise it’s obvious the outer wings have been off at some point (look at the mounting bolts along the top)
Boot badges are on wonky - there’s no way that’s original paint, it’s been resprayed due to rust.
Not being funny but how do you know the paint (and panels) on your car are original? Many of these had wings/bonnets/boot lids/doors etc under warranty or goodwill from MB back in the day, and unless you know where to look you might not realise