For some time, without any prior reason, my X350 2004 flashes five times when I put the key in the ignition.
The directional indicators don't flash once plus in some markets an audible warning is not emitted.
Alarm does not arm. The LED on the console does not flash when the car is locked. Besides, the car starts and runs normally.
Programming the immobilizer, REM, ECM via SDD v131 does not help and does not change anything. When trying to change the dealership options, a communication error with the alarm sensor in the headliner pops up, but only sometimes. Invariably, the alarm is not active. I replaced the alarm sensor with another used one. The current goes to the sensor itself. Panic alarm is working properly. Sirens howl.
Has anyone had the same?
Maybe some other hints, suggestions? help