RVBarry
2023 AWD 170 DIY CamperVan
Hi,Ugh... This is bad news. I was just trying to solve this problem myself and I'm no pro audio installer. I was thinking I could run the wires for rear speakers from the center channel that I plan to disconnect. Any reason that won't work?
1. Won't get a stereo signal that way, in the rear.
2. Two (or more) speakers in parallel would lower the impedance, increasing the load on the head unit/amp.
Wiring in series would be safer but if the impedance is too high, the rear volume would be reduced.
Note some sprinters have optional rear speaker prewiring under the driver's seat.