I spend more than 400 $ on a navigation system from a seller who named ZWNAV. The system dosen´t work, me revers alarm on the car, me day light,cruise control,onboard computer and tire pressure monitor system(tpms) dosent work. I ask the seller to help me but nothing happend. Finaly i open a dispute case to get aliexpress to helping me but the wont help(shure its cause its a big amount). Ali express say it needs a video to see the problem but the system can handle a video. The seller say the same , shure the seller knows i can send a video. So now im here with a navigation system that dosent work as promissed and more than 400 $ much poor. Another big trade site seems to be a