I found the issue or better issues. The turn light and the problem with the steering wheel are two independent problems.
1. The cool down BCM and normal working after restart engine is normal state for BCM. It so working after the bulb failure.
2. The disfunction of steering wheel it is LIN BUS fault. The electrcal connections for HF under left rear sliding door are faulty. There are 3 pins: +12V ACC, GND and signal for LIN. And one pin was without connection - GND. And LIN bus was unsettled. After cleaning GND connection all starts working :-)
If you observe that some function for LIN bus do not working you have to found all junctions for all LIN bus units. It is full working time.
Thursday, March 24th, 2022 AT 4:52 AM