Flashing Defrost and seat heaters

[AtlBenz]

in all the years of owning countless W124's I have never experienced the following.

yesterday, as some of you may know, GA and the south east was hit by a pretty severe snow storm. So, logically, the wife and I decided it would be a grand time to be out and about. well upon entering the car (1995 E320 wagon, 148K), the car was started and as per standard cold-weather operating procedures, the seat heaters and rear window defroster were activated. then they began to flash. looking down at the console it was as if a wig-wag pattern had been activated. then the rear defroster switch also started to flash. eventually they resumed normal behavior and as far as I can tell all electrical functions are normal.....but what the heck was that!