burnt rubber smell and loss of headlamps

Hi all first time here hope this is the right place. I drive a 1983 Benz 300CD I have had very few problems with this car but was driving it this morning and noticed this horrible burnt smell to the car happened yesterday the smell that is and i couldn't find anything wrong (checked tires and brake lines and oil and trans fluid made sure nothing was dragging or rubbing on or near tires or exhaust) with the car but this morning when i turned the head lights on they came on and then they all went off at the same time all the head lights and fog lights just went off no reason the turnsignals and brake lights still work but the headlights won't. I was wondering if anyone had anyideas as to what might have happened given the smell and now the non working head lights ideas. thanks in advance for the help.