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W210 E420 - sudden MPG drop
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09-23-2008, 12:15 AM
Glen
...auto enthusiast
Join Date: Sep 2000
Location: Carlsbad, CA USA
Posts: 1,187
Would I be correct to assume that the sensors in front of the cats are more likely to be causing the poor MPG? Don't the rear sensors just measure cat efficiency?
Glen
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