I found a tray off of a 2003 E320 and it’s very small, barely fit my Oakley. I left the compartment bare. It’s deep and adding a felt liner will work if you really care how it looks. I used a female fiber optic loop to get the power lid to work with the push button (George noneja idea). I routed my iPhone Charge cord through it to plug in for Apple car play. Love the conversation of gutting the changer.

 

Thank for response drothgeb! Can you tell me "step by step" how did fix it?

 

Nice!!

 

I don't know what the pioneer wiring harness looks like, I installed the extrons unit. But there should be serperate aux power which needs to only be on with the key (ACC or AUX 12V labeled something like that) and also a permanent 12V source wire that does not shut with the key (labeled power/battery/etc).