Mercedes Benz W176 A class LED day light does not work after LEFT headlamp module replacement. Launch X-431 PAD Series can support to solve the problem, working on tablets like Launch PAD VII, PAD V & IMMO PAD. Following is the detailed solution.
Solution Procedure
Make a full health report and check all DTC at first.
Click “Read fault code”.
There’s a DTC:
B177655 – Control unit “Actuation module, LED exterior lighting, left front” has a malfunction. The component is not configured.
Special function >> Teach-in processes >> Commissioning of control unit “E1n7″(Actuation module, LED exterior lighting, left front)” >> Continue
Follow the instruction to input string.
Click “Continue”.
The coding is being performed, please wait…
Commissioning of control unit “E1n7″(Actuation module, LED exterior lighting, left front)”
– initial startup of the control unit was completed successfully.
Check the following light functions:
– E1e5(Left front turn signal light)
– E1e13(Left parking light, standing light and daytime running light)
Click “Continue”.
Go to Clear Fault Code.
Are you sure to clear fault memory? Yes
Clear fault memory completed.
Go back to read fault code again.
There’s no DTC.
Problem was solved!
This is how to use Launch X431 Pad 7 to solve the Mercedes LED daylight not working problem.
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