I managed to find a way to install an apple car play unit that does not interfere with the functions. Can work for all W124. This is the 7” screen which fits just fine. I routed the usb cables into the glove box.
Here is the unit on Amazon. It also sounds better than the old after market Alpine I had.
BOSS Audio Systems BVCP9700A-FL... Amazon.com

Here is the unit on Amazon. It also sounds better than the old after market Alpine I had.
BOSS Audio Systems BVCP9700A-FL... Amazon.com
