Mmr1

2013 Glk 350, my turn signals on the mirrors don’t work when using turn signals. They both light up when alarm is activated or deactivated so they are connected. Where do I look for the problem ?

CaliBenzDriver

Both your side mirrors signal lights blink for lock/unlock BUT NOT for turn signals.

"When all you got is a hammer, everything looks like a nail", right?...

Does this sound like another CAN disruption or what ?

- Try to scan the car for DTC faults. See if that helps points you somewhere.

- Front Lights are controlled by F-SAM.
When the turn signals blink you checked that both front and rear blink just fine, true?

- Verify mirror lights are connected to each Front Door modules in which case these modules may not be picking up "mirror blink" message from CAN Bus.
My bias is I'll suspect busy SAM before solderless door modules.

Perform a "battery Reboot" to sanitize the SAM's: disconnect batteries for 15mn then reconnects scan codes, and test using warning blinkers button
- I don't think you need IGN:ON for hazard lights, correct?