running rich

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    CLK 200 Kompressor (M271 1.8L) Running rich and high CO emission

    Hi! My car recently failed a emissions test because of too high CO. The car seems to be running rich too. I have not noticed the car running worse/rough or smell from exhaust but fuel consumption feels exsessive. The car is throwing the following DTC codes: P0170, P0137, P0172, P0138, P0136...
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    CLK200 Emissions - MOT Failure - Running Rich

    Anyone come across this before? 1998 CLK200 Auto with 68,000 on the clock has just failed its MOT on emissions. CO and HC are way high and Lambda is low. Chap doing the MOT said it needed a new cat but I'm struggling to see why the cat would cause low lambda. I've pulled the plugs and...

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