I've got a SLK 230 03 it's had some aftermarket lights but they are useless has the focus lens it doesn't matter how much you adjust the beam it doesn't change the light beam mechanism works but the beam doesn't move, made in Taiwan, what's a good aftermarket light I should look for that's cheap or should i try and get the original? What's the best way of break down the silence I wanted to take them apart acetone doesn't work well on the ABS plastic is there a chemical that can be used to break down the sealant?