Didn't the W210 have corrosion issues?
yes. especially northern cars. 210's were very very boring vehicles.
I disagree with jb. the 124's were the last truly over built Benz E class. The 210 is 'tinny'.
if you have one with self leveling, be prepared to drop a good amount of money when the lines start to leak from rust.
The engines are fine and the transmissions will last if you service them regularly.
You may still find one in great condition south of Virginia, especially in the WASPy economic areas.
Every 210, thru out shop, has rust even the ones detailed regularly. Unfortunately after 15 years even my BMW is starting to rot. Wagons always start in the rear and work thru the quarter panels. The benzs rot at the bottom of the doors up and at the wheel well lips.
They are extremely boring but if you find one in good shape it will rot out before it leaves you stranded. The common issues are crank sensors, stop light switches, and hvac head units. The steering wheel buttons are always sticky, from the coating wearing off but you can buy new buttons.