Hello everyone. It's been a while since I browsed the website. Hope all is well and in good health. The navigation computer on my 2000 E39 M5 went out, which is the MK2. The screen is just black, and the radio will only play for 2 mins. Can I replace this with the Mk-IV? if so, is it compatible and does anybody know where I can get the Mk-IV? Will I need to do any modifications, or is it plug and play. Can I also replace the screen? Is there any local place (Seattle area) where i can get the products? Thank you.