Hazard lights flashing every now and then

[kreisp]

Hello,
my wife has an A140 (W168) from 1998 with 130000 km

For some time up to now, every now and then, the hazard lights will flash. This happens while driving or even with the car stopped and idle.
The car has no alarm fitted.

Sometimes the doors unlock by their own and the remote command will stop to work.
I've found that if I unplugg fuse 30, the failure will disappear. However after some days, the hazard lights will start to flash again or the doors will appear unlocked.

With a fault code reader we found error B1101.
After some research I found it is related with the control module for RFL and DAS.

Do you have some wiring schematics for this circuit.
Can you give some hints on how to narrow down a bit the chances that the failure is related with a faulty module?

Thanks