[geogh002]

Hi, I recently bought a 116i F20 2012 with 200.000 km and sometimes I see grey smoke from the exhaust. What could be cause? Yesterday I changed the oil, the filters, spark plugs and coils (not sure if they re called like that in english, those are the ones above the spark plugs). I think the problem was before because the exhaust seems to be black but I first time saw it yesterday.