1994 Mercedes Benz SL600 Base 12 Cyl 6.0L
when engine gets hot it smells like oxide nitrogen.blue smoke comes from engine. the EGR ,throttle body are good.
no leakage in exhaust. idle is good.
Blue Smoke: Blue smoke is caused by engine oil entering the cylinder area and being burned along with the fuel air mixture. As with the white smoke, just a small drop of oil leaking into the cylinder can produce blue smoke out the tailpipe. Blue smoke is more likely in older or higher mileage vehicles than newer cars with fewer miles.