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Originally Posted by Hatterasguy
My answer is that the 606 is the sweetist diesel MB has brought to this country. 4 valves per cylinder with double overhead cams, it will rev sky high and pull like crazy in turbo form.
Now the older 617 is a good engine, but it is not as powerful or returns as good mpg's as the newer motors. Also dare I say this they don't seem to last as long and hold up as well.
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I think this is sorta contradictory...more parts generally = more stuff to need maintenence (therefore) equal maintence between the two = one fails first
The 617 stands up pretty well...you don't often find examples of people abandoning their 617 when it "clunks out", the "head cracks, or it "won't start"
Just like the older 220D's, 240D's, etc. the simpler engine takes less to get more as far as longevitiy.
You can drive a 617 with loads of blowby and numerous problems until the day it dies whereas the 6 cylinders are a tad more finnikey about all their trinkets working in sync.
But the 6 is fast...what can I say
