Date registered: Oct 2003
Vehicle: 500SE AMG, E350 4matic, GL 450
Mentioned: 0 Post(s)
Quoted: 78 Post(s)
The 300E has a M103 engine. If maintained, expect to have to do the timing chain and top end at about 200K or so. The 420SEL is a w126. There should be a buyer guide on that forum (I think). Great vehicle. From what I head on those V8's timing chain is at about 100K. If you do a search, I am sure you will get some answers on that.
Personally, I would go with the 420SEL. It is not going to give you great gas mileage, but it is a solid mercedes.