I looking for a good used one, new style.
The engine in my car has the old style. it works fine, no noise, leake etc. I read here that these can be self-destruct and destroy other things. Can these be maintained (cleaned etc.) or they need to be changed regardless. Also, some changed the newer ones as a preventive measure. In the MRBZ CD there nothing mentioned except " vacuum pump updated for cost reasons". can somebody explain more to me this issues,
thanks

All I can say is I would interpret "cost reasons" as the early ones self destruct and costs them (MBNA) a new engine (under warranty) and of course the factory warranty has long since run out on a 20 year old car.
Take my word for it, you are on borrowed time with an early style Vac Pump!

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'95 E320 Wagon my favorite road car. '99 E300D wolf in sheeps body, '87 300D Sportline suspension, '79 300TD w/ 617.952 engine at 367,750 and counting!