E320 is a gasser, unless you want the 2-E-Lemon body with the aluminium CDI.

If you mean the E300 diesel, from what I have gathered, the OM606 is powerful and every bit as good as an OM603 or OM616/7. But, having the chance to look over one (but not drive it) I feel they have too much plastic and "build-to-cost" style to suit my wants.

As with any car, some people have no problems, some things like frozen glow plugs, and some say they are lemons.

As for me, if I don't get a VW TDI first, my next car will be an SDL.

Based on current events, I would not even think about using eBay to buy a car unless I can see it in person or know for a fact it's good (Have a friend or forum member look at it).