emmissions

  1. D

    W123 300 emmissions tips?

    Hi there, MOT time again and I was wondering what tips you all have to get smoke levels down. After fixing all the issues from the first MOT it missed the retest cut off and so 140 miles later failed its second full test on emmissions. It failed at 4.93 M -1 with 3.00 M -1 being the...
  2. M

    W202 Emmissions "took a long time to test"

    Hi guys, My 202 was MOTed this week. It passed ok without any advisorys but the tester said that the emmisions test took a long time to do, and I probably need to get cats changed before next test. Now a good few years ago, I was getting a rattling noise from under the car. You good guys...
  3. M

    W124 Ignition Timing & Emmissions

    1991 H reg 230e automatic. Can someone advise what's the best setting for the ignition timing with regard to obtaining optimum fuel economy? Also, what should the emissions be? Mine were 0.67% at the MOT a few weeks ago which I thought was a little bit lean. Finally, do these engines...
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