Android 10.0 Car DVD Player GPS 9 inch Touch Screen Stereo Radio for Mercedes-Benz B200 A B Class W169 W245 Viano Vito W639 Sprinter W906 2+32G

Got this today 6/12/2020 connected to my Mercedes A150 ,would not turn on nice looking stereo but no good if it don't turn . Replaced my original stereo came straight on ,,,,

Won't even power on...Fits fine in the dashboard, much shallower than original headunit, looked like maybe cabling missing for connecting to existing speakers though - no instructions, diagrams, manual or anything provided. Didn't power on at all, has capacitive touch power button so no feedback at all. Tried the reset button, still not a peep. Original headunit installed and straight away powered on fine... Returning to Amazon for refund. Disappointing, and sadly unbranded so I can't avoid that brand in future.