Android Car Head Unit 7.1.1 keeps restarting/rebooting - MTCD Android Head Units Q&A

Hi, I bought long time ago for my Mercedes W203 an Android Head Unit from Aliexpress. Yesterday I was searching how to turn off its bluetooth so I went to Factory Settings; insert 126 as password; an change in the first page bluetooth from"md..." to "Parrot..."
After saving and exiting it asked for reboot.
Till now while I am driving the Head Unit keeps restarting/respring. I also tried to reset and remove the battery of my car without any luck.
Here are some specification of the Head Unit (I wrote them before having the problem):
Model: px3 (1024x600 W)
Android Version: 7.1.1
CPU: ARM Coretex-A9 @1.6GHz (x4)
Memory: 2048 MB
Kernel version: 3.0.101+ | [email protected] #476
Build number: px3-userdebug 7.1.1 NMF26X eng.hct.20170509.102343 test-keys
MCU version: MTCD_KD_V2.41_1
Please!!! Could anyone help me fix it?

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Here are the info on the system:
PX5
Android 9
Build: rk3368-userdebug 9Pi 20200309. 134156 test-keys
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Best,
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