Had this on ours and it was the first sign of problems with the ccm comfort control module ecu under the front passenger carpet. The alarm going off randomly was the next sign. The ecu was wet from the well known (not to me at the time) water ingress. Local VW indie spent a couple of hours unplugging it all, drying it and the carpets out and curing the water ingress problem and luckily we had no more issues.

Moved to Technical.