2005 Mb c320 Front low beam not working Disconnecting the bulb and and connector. No spark when Headlights sw is turned on. Working headlight has spark. Fuses are good. What could be the problem?

Do you have xenon lights? The brighter/white light? what do you mean when you say the headlight has spark? If so you might have a control module, or wiring problem. Even if they are not xenon bulbs you still might have a control module problem, the headlights are controled by the front sam control module, located in the drivers side rear of the engine compartment. Re-check to see if you have power at the fuse, is it fuse 51? 7.5 amp. I believe this is the fuse to check, in the front fuse box under the hood.