^ still don't understand the above.

Aftermarket wire is usually of a better quality than standard already installed, even if mercedes are installed with bose. My cabling for my first build cost almost £70. Ive just had a new box put in with a set of thicker gauge cabling and the sound is definitely a lot better. I've even had the rear speakers rewired for when I have my bass up, I can have it up for a longer duration.