Okay so I got my wiring harness installed I’m my 2003 e320 (I used scoshe harness) and it is sounding nice, now I want to add subwoofers. How exactly would I go about running the av wires through the trunk to my head unit? Also wanted to wire a backup camera but can seem to figure out how to run the wires

 

there is a channel dow the sides of the seats. you need to take the back seat out and remove the kick panels and move the carpet back.

 

sorry I’m 17 this is my first car and I’ve been saving to get it, what exactly are kick panels? Are they the plastic in front of door speakers? And what size torx bit do I need to remove back seat where the seatbelt is?

 

do some googling and you will find all these answers. they are the plastic pieces. the "step" in the door also.

 

I tried googling info on it before and found nothing, that’s why I came here, all the e320 info I lookup on are older models and are different

 

See attachments.