I wanted to update the interior of my E with a new head unit, so I chose the biggest one I purchased this 10.1" screen on Amazon for about $100. The installation was a little tricky because it required some custom brackets but it looks almost OEM all said and done. I was able to retain the factory 7 speaker amp and aux port. Super happy with the install so far and can't believe what $100 will get you these days! For anyone wondering my shifter surround and steering wheel parts are wrapped.