Many times (not always) when I indicate left or right, the signal will do it's three blinks but stop despite being in the full locked position. A little pressure will keep the signal going.

When the indicator stock returns to centre, the signal will finish with three blinks if this glitch occurred.

This is the second GLK250 I've driven that had this issue (first was a test drive).

Any insight?
Thanks!

Seems to be a fluke? Or maybe it's something with the blind spot assist that's wonky.
Ours does the 3-blink to pass, but has never NOT blinked continuously if the turn signal switch is fully pressed.

Thanks for the reply. Could be a rare problem that both the tested glk and mine happen to have.

Does anyone know if there is any software that controls the signals or is it just relays and switches?