Air Filter Restriction Indicator

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johninwales

New Member
Joined
Jul 24, 2006
Messages
20
Location
South Wales
Car
W211 E Class 320 cdi
Recently noticed that I am blowing out loads of black smoke under heavy acceleration. Performance, idling and fuel economy all seem OK.

The Air Filter Restriction Indicator no longer shows a reading (orange area) Serviced by MB about 7K ago.

Bearing in mind that a filthy filter can cause smoke the question is: should the Air Filter Restriction Indicator be clear (Black) if air filter is OK, or should it be showing orange at 100% if filter is OK.
 
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