My '79 300SD has an electrical gremlin i cannot identify. The dome light does not work consistently when opening the drivers side door. The passenger side door activates it properly each time. I have replaced the door jamb switch and the entire dome light fixture/bulb and it still only works occasionally. To add to the confusion the glove compartment light also only works occasionally. everything else I can tell works, buzzer, instrument cluster etc and even the dome light if I set it to manually on. anyone else experience this?