Thread: W210 E420 - sudden MPG drop
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Old 09-22-2008, 12:49 PM
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Glen Glen is offline
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Join Date: Sep 2000
Location: Carlsbad, CA USA
Posts: 1,187
Thanks Doc. Do you know off hand, how many O2 sensor a '97 E420 has? I believe it's an OBDII car...so I imagine there are two sensors before the CATS and two after.
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