w/out seeing a pictures of what you mean exactly by 'opaque' it's hard to say. Unfortuntately is sounds like they are pitted (in which case replacement is the only option
), but given that the car is immaculate as you say, it seems strange that the lenses have suffered so much.
Anyone else with an early W210 whose expereince premature aging/pitting of their headlights?
As a side note: even given the low mileage (and lack of paint chips), the windsheild on my '95 is pitted worse than other cars with twice the mileage and wear. I wonder if softer glass/plastics can make it through MB inspections on occasion?