Hi John, may a bit ignorable from me, but I really did not know they were delivered without a sound system. I thought basic it was standard. As my dealer in The Netherlands specced a beautiful PlusFour (MY end 2022) with virtual every option, completely to my taste, I was not involved in the speccing proces. I simply bought it from the showroom. It has the optional lockable space compartment in the rear, but that is of very little usable value. I just can put the reflective jackets, user manual, travel permits and collision form in it. There is not much space to put it elsewhere. My 4/4 has a lockable glovebox and doorpockets, so huge in comparison. Clemens has his beautiful MorganPark wooden dash in his PlusFour, but that leaves just even less space in the "glovebox". So I quit understand your modification. Cannot understand why MMC did not make that compartment in the back larger. I know it's a relatively expensive option with very little usable value.
I now see you mentioned that you do not have the sound system, MMC should have the wiring diagram, I see no reason why they should not share it with you. Compliments for your modification and good luck with the sound system as a future project. It is not that important but sometimes it's nice to have and use. In my 4/4 I never had a sound system too, but it was a lot louder inside than the PlusFour....!
