Iceman,

First some electrical terms:

When something electrical doesn't work, it usually an "open" or open circuit which means there is lack of continuity and electrical current can't flow. This can be either in the "hot" or ground side of the circuit.

A short is a condition where there is no resistance so a very high current flows in the circuit. If the circuit isn't protected by a fuse or circuit breaker, nasty things will happen: melted wire insulation, burned off wires and possibly a fire.

Getting to your problem: MB uses separate fuse to each head light filament. Therefore it could be a fuse that has corrosion on it that is causing your head light to work intermittantly. Happened to me.

Look on the fuse list and find which fuse goes to the non working headlight. Remove that fuse and scrape the corrosion from the fuse connection and the fuse holder if necessary and replace the fuse. If this doesn't work, you will have to check thru the circuit with a voltmeter.

I still can't figure why MB uses those flimsy fuses when glass encased, chromed ends, Buss type fuses are much more reliable.

P E H