How to Fix MB Star C6 Multiplexer Disconnecting and Reconnecting During Diagnostics

Problem Overview:
While performing vehicle diagnostics using the MB Star C6 multiplexer, the device intermittently disconnects and then reconnects on its own. This issue can prevent successful diagnostics and disrupt workflow.


Issue 1: Unstable Connection During Diagnostics
Observation:
During diagnostics, the MB Star C6 suddenly loses connection with the system and reconnects shortly after.

Response:

  • Check your distance from the vehicle. The issue may be related to weak WiFi reception on the diagnostic laptop.

  • Ensure the device is placed outside the car for a clearer signal path.


Issue 2: Diagnostics Cannot Start Due to Lost Multiplexer Connection
Observation:
The system fails to initiate diagnostics due to constant disconnection from the multiplexer.
User reports that after restarting the entire setup, the system begins to work again.

Response:

  • According to the engineer, signal interference in the workshop could be causing unstable connections.

  • In factory tests, the MB Star C6 WiFi connection remains stable up to 10 meters from the vehicle.


Issue 3: Diagnostic Failure on Multiple Vehicles
Observation:
The user reports that this is the second vehicle since Saturday where diagnostics could not be performed.

Response:

  • The engineer found that the device was connected via WiFi using a C4 device ID instead of the C6.

  • The correct WiFi name should match the serial number of your C6 device.

  • Ensure the correct WiFi network (matching your C6 serial) is selected to allow proper communication.


User Feedback:
After correcting the WiFi connection to the appropriate C6 network, the device started working correctly again.
Feedback: “It seems to be working again. Thanks a lot!”


Conclusion:
If your MB Star C6 multiplexer disconnects during diagnostics:

  • Verify WiFi signal strength and minimize interference.

  • Place the device outside the vehicle.

  • Ensure you’re connected to the correct WiFi network (specific to your C6 serial number).

  • Restarting the setup can also help re-establish proper communication.

If problems persist, consult with technical support for deeper troubleshooting.

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