dear,
thanks for your message.
1.this product ship from China.
2.Every order from us has a 30-day return and refund guarantee, which entitles you to claim a return, refund or replacement within 30 days of receiving your items.
3.this is return address:
Address: Room 202, 2 Floor, MaAnShan Second industrial zone, ShaJing Street, BaoAn District,Shenzhen City, Guangdong Province, China
4.it is build-in,you don't need an external dongle.
5.yes, this unit will support all the button controls that are on the side or the normal Nav screen, like climate, front and rear defogger, sound/equalizer controls, phone, etc.
6.it can support all the steering controls like volume, radio, display, phone, etc.
7.it will integrate into your current ML sound system and speakers.
8.we will send two USB cables in the package,you need to use ours.
9.just the version, storage and cpu are different,others are the same.both support Apple Carplay.
10,yes,it comes with everything to replace the current Nav unit including matching trim and all connector and adapters.
11.All of our products are covered by a 3-years warranty for its replacement and repair.
looking forward to your purchase.
By
Seicane