dirt and dust in the turn lever stalk - if the problem happens when the lever is at rest, this is a strong possibility, you can try cleaning it with some wd-40 to rinse any built up dirt and contaminated greaseo out of the base of the lever
a burned out turn signal bulb
There was a recall on the hazard light switch on some years, this would be a bad relay/hazard switch, call VW customer service and they can check for you to see if it was done. The reason why is because it functions as the turn signal relay. Don't forget the brake light switch recall, if the little switch under the brake pedal is not green, you don't have the latest one.
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