This is what AI says:
That "two-way radio" sound during an Average Speed Zone is actually a very specific—and slightly annoying—feature of the MG navigation software.
In the MG S5, the car doesn't just check your speed at a single point; it tracks your average over the whole zone. Here is exactly why you are hearing that specific glitchy sound:
1. The "Data Stream" Sound
Inside an average speed zone, the car’s GPS and the i-SMART system are constantly communicating to calculate your rolling average speed.
* The Glitch: Every time the car "pings" a new camera or recalculates your average, it briefly interrupts the audio system.
* The Sound: If the radio is unmuted, this interruption causes a digital "pop" or "squelch" because the car is trying to layer a "silent" notification over your music. It sounds like a radio keying on and off because it is a literal digital "handshake" between the navigation data and the speakers.
2. The "Invisible" Alert
Even if you have the voice warnings turned off, the system still "reserves" the audio channel when you enter or exit these zones. When you unmuted the radio, you essentially "caught" the system while it was still holding the audio line open for a potential speed warning. The "radio sound" was the audio gate slamming shut as the system realized it didn't need to speak.
3. Navigation "Tick"
The built-in MG navigation has a "Speed Camera Alert" that is often separate from the "MG Pilot" speed warning. Even if you aren't using the map for directions, it runs in the background. In average speed zones, it can "glitch" and play a half-second of static instead of the intended "ding" or "beep."
How to stop the "Average Speed Zone" glitching
To get rid of that specific radio-style interference, you need to dive into the Navigation settings (not just the main car settings):
* Open the Maps/Navigation app on your main screen.
* Tap Settings (the gear icon) inside the Map app.
* Go to Alerts or Sound & Warnings.
* Look for Average Speed Zones or Speed Camera Alerts.
* Change the setting to "Visual Only" or "None."
By doing this, you stop the car from trying to "hijack" the speakers every time it updates your average speed, which should stop that "two-way radio" sound when you unmute.
