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Does anyone know if the desulphurisation / regen causes a rotten egg smell from the exhaust or is something wrong with mine? Only happened briefly after a spirited run. I have had NOx errors recently but nothing on the bimmerprofs "your NOx is dead" list of codes. Sulphur stinks of eggs so I presume the rotten egg smell was a regen rather than overfuel cat smell in which case my nox must be working to trigger a regen. 35mpg on a 25 mile motorway run this morning too, not bad for a 3.0 petrol F10.
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