New customer rolled in with 2003 Mercedes e320. Right head lamp out...stopped by cop.....she previously had local NAPA install new bulb...still not working...I found no power to bulb and no fuses blown anywhere. ( Under hood, in side panel and trunk.)

Test light proved no voltage to socket...btw... NAPA had mistakenly re installed old blown bulb.... Doh ! Tried the new one...no change.

Is there a bulb controller like the BMW somewhere or am I looking at doing some detective work.

Have checked the front and there are no signs of crash damage or repainted panels.

Any ideas folks ?