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How to set car logo on universal car stereo like Benz logo.
You need to open setting, find factory setting, put your password 126, please click car logo, you can see many car logo and select it.
How to set GPS sound mode.
If you want to listening music and navigation at the same time, you can turn on setting and choose GPS, then select GPS monitoring and set at Mixing
You also can see this video to set.