Hi old blue and many those who reply to this msg :-

Thanks for the detailed info of the qualified MB mechanic in our area. Will keep that address and phone number -- these days qualified and HONEST auto mechanics are like endangered spices.

Well, today I replaced all Bosch Platinum plugs with NGK copper core plugs (one of the major auto shops, again, doesn't carried any Bosch copper core plugs).

Suprise, those rough idle has gone almost 95 % !!! Only some very minor shake a little at stop, it's a high mileage car and I can live with that.

So that's it. Thanks for all who reply and give me this GREAT ADVICE. Especially sixto, joe p and euro 287.


Regards.