My 430000 mile W124 was one of the best cars I ever owned , and I’m sure would still be running if an idiot woman hadn’t run into it while parked and written it off .There are quite a lot of good ones out there! I remember many moons ago when I was proposing buying a high mileage E class (400K miles!), the advice from here was run a mile. So I went in with my eyes open and bought it anyway because it was honest (no-one would clock it down to 400k!), a reasonable price and it was a nice place to be. Sure it wasn't perfect but I put another 75k on it without any real issues and sold it to a nice Irishman who drove it back.
Hope you haven't bought that one! (I jest - yours is a much newer C!)
All my cars go north of 200000 though .