2006 Mercedes-Benz S-Class S350 4dr Sedan (3.7L 6cyl 5A)
Purchased this one two months ago with 51,000 miles on it.
Was looking at a S430 also, but now glad I purchased the S350.
I didn't buy the car to race and the 3.5L engine is more than adequate to power this vehicle.
It doesn't have all of the gadgets the S430 has, but then there are less gadgets to fail later on.
Comfort and quality are all a Mercedes should be.
This is by far the best driving Mercedes I have owned (my twelfth one).
I thought my 1985 500SEC (Euro) was nice and my 1994 E420 was great, but this beats them hands down.
Body is excellent and the interior is superb.
That's all I have to say about that.