Check out the Thread 300SE vs 560SEL below.
As I said in their, 560 SEL has different suspension in the rear from 420 SEL or 300 SE(L).
Plus, unlike any others, 560 SEL has rear heated & power seats.
Make sure the car has decent services and maintenances history.
I have a cream puff in smoked silver with red wine (burgundy or maroon) interior (it is 420 SEL, though). There is German-Austrian mechanic who specializes in Mercedes-Benz in my town, and he said it is a beautiful color combination.
Other than that, I would say go ahead and get it!