EMISSIONS PROBLEM, MOT FAILURE, E230

Jan 08, 2005 3 Replies
C

Any help with this would be greatly appreciated!


1996 E230 Estate (Model 210), failed MOT test because the emissions (CO2) are too high. It has had a new catalyst fitted 2 months ago, a new temperature sensor, so far no change to the problem. I'm about to change the "Lamda" (Oxygen sensor in the exhaust manifold).

I've had it checked on a Mercedes diagnostic computer and the results have so far been inconclusive.



Any suggestions as to how to reduce these emissions? It's currently reading CO2 0.4 and I believe should be below CO2 0.33.



Thanks in advance,



Chris


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J

CO2 ??? As in Carbon Dioxide ?

Or CO, as in Carbon Monoxide ?

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T

You don't state when this motor was last tuned up - new spark plugs etc. or the total miles on this engine - if over 150K miles the engine's compression may be low. Another thought is dirty fuel injectors, which can be removed and professionally cleaned for about US$20/ injector - such injector service is also available in the UK.

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D

FWIW, as you know, CO2 emissions are the basis for vehicle excise duty in the UK, however mad that might be.

Does the garage that did the MOT test not have a comment? My old 190E 2 l (1993) hasn't failed on emission grounds so far...

DAS

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