have just bought an 03 c270 cdi today and was having a nosy around it tonight. there is an adjustment near the airflow meter on the left side of the engine bay with a percentage marked on it 75-100% what is this for? Turned it down [anticlock] and it won't turn back up!haven't got a user handbook with the car!
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It's not an adjuster - it tells your mechanic :) when the airfilter needs changing.
Edited by Bill Payer on 08/10/2009 at 11:29
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Paul, do not interfere with a knob when you don't know what it will do!
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so it looks like you have simply reset it.
All i would do is simply replace the airfilter, (as it apears that the old one was indicating replacement soon anyway) and then the "knob" will moniter the new one properly.
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thanks redviper,doctorchris and billpayer for your help!drove the car a mile and the indicator went back to red. im not usually one to fiddle with knobs but used to have an audi tdi with a tuning box fitted and a connection to the airflow meter where the power could be altered via a potentiometer thought this was a similar mercedes factory fitted arrangement lol! have just been called a knob no doubt!
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