Slight diversion. I purchased an Asus Zenbook a few weeks back, upgraded it to a 512SSD, and started working on getting a garage laptop set up so I can tune the stereo system DSP, and also so I can do programming and diagnostics on these modern BMW's. I need to sort out the software installs, but the hardware arrived from China today from a reputable seller and just over $200 shipped. Hard to beat,and this will pretty well talk to every BMW in a 20+ year span I've got sitting around here. In case anyone is interested,
here's the seller's listing on Aliexpress. There are a few coupons which can drop the price. This is about $100 less than on eBay I believe.
I wish I had this when I was recently trying to diagnose the top issues on the Z4 ...
Filippo