What is the reason why the C200L is connected to Bluetooth but has no sound?
3 Answers
C200L Bluetooth is connected but there is no sound. The reason may be that the car computer is set to mute, or the car computer circuit is faulty. The following is a related introduction to the 2021 Mercedes-Benz C200L Fashion model: Power system: Equipped with a 1.5-liter turbocharged 4-cylinder engine, paired with a 9-speed manual and automatic transmission. Body dimensions: The length, width, and height are 4784mm, 1810mm, and 1457mm respectively, with a wheelbase of 2920mm. Chassis: The drive system is front-engine rear-wheel drive, with a multi-link independent front suspension and a multi-link independent rear suspension, and a unibody structure.
Yesterday I encountered the same annoying issue with my C200L where Bluetooth connected but no sound came out, and it took me half an hour to fix it. First, check if your phone volume is turned down, especially since some apps independently control media volume. When getting in the car, remember to select 'Media Source' on the central control screen and switch to Bluetooth audio mode, as Mercedes defaults might be set to radio mode. Also, check if the mute button in the car was accidentally pressed—the star button on the steering wheel is particularly prone to accidental touches. If you've recently updated the car's infotainment system, it's likely a software glitch; turning off the car and waiting ten minutes before restarting usually solves it. For older models, it's recommended to disconnect and re-pair the Bluetooth device—deleting and reconnecting it in the 'Device Management' section works wonders. Occasionally, the trunk amplifier module overheating can also cause this issue; parking in a shady spot to let it cool down usually helps.
I've seen numerous cases of Bluetooth audio failure in the C200L, mainly involving four areas: multimedia unit settings, Bluetooth module power supply, phone compatibility, and audio wiring. First, force restart the unit by holding the volume knob for 10 seconds - this resolves 70% of software glitches. Then check fuse F32 in the fuse box (dedicated to audio systems); replacement costs just 10 yuan if blown. Pay special attention to whether the 'call mute' option is enabled on the phone - some domestic phones activate this inexplicably. The Bluetooth amplifier module in the left side of the trunk is prone to moisture damage, especially during rainy seasons; simply unplug and clean any oxidation. As a last resort, perform a factory reset via the 'System' menu, remembering to backup contacts first.
