here we go again, 124 electrical demon

[land sea air]

so i guess now that i got my 87' 300E back on the road again after an incorrectly installed cap and rotor problem, its time for somthing else to act up... tis the way of the old mercedes i guess. anyways, my exterior bulb warning light came on, upon checking all the bulbs and seeing none on i turned the car off and restarted and it went away, then it came on again with NO external lights on , so i figured i was having some sort of problem. then the light was only coming on when using my high beams (however the high beam light on the guages was not coming on), when i checked the high beams i noticed that the passenger side was out so i replaced it, but no dice, and then on the way home today with my friend following me, he called to say that sometimes my passenger side brake light was not coming on, but only sometimes, what could be causing this evil???