Diesel engine-d cars in the Netherlands have to suffer a soot-test once a year. This means that the car has to do some 5000+rpm's for at least three periods of 4-5 seconds when the car is in its neutral (I don not know why our government came up with this disastrous idea, but...it has to be done (after the owner signed a paper that he is responsible for any engine damage caused by the soot-test).

All other out-coming gases are not of any importance.

greeting,

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1990 300SL-24
1993 C250D with a minor 600+k kilometer
www.MBenzNL.com(the Netherlands)