hopeless

I have been doing quite a bit of driving in the dark recently and I've found the headlights on my E280 Estate terrible. The high beam is brilliant, but the main beam is pathetic. Do these weird headlight bulbs wear out and go dim or is it just normal on this model?

please help me get my car up the hill where i live lol CLK220 Sport its really terrible in the snow, infact its just slush now on the road where i live most cars dont seem to struggle ive seen corsas etc getting up there both rear tyres are pretty new with loads of tred in them, they're pilot...