Does anyone know how to upgrade the charging system to keep up with my aftermarket system. I am currently running 2-1000/2 Arc Audio amps for the subs (2-10") and 2-400/2 Arc Audio for the mids & highs (2-6.5 componets). I have the factory group 27 battery in the factory location and two group 24 Optimas in the little cubbies on each side of the trunk in my w210. My headlights, dashlights, etc.... all dim each time there is a draw in current from the amps. I know that this is a problem I've created with my need for music.... But theres just something to me about the dimming lights thats a little embarrassing. Thanks for your help..