I was slowly pulling into a parking space at the beach. Pulling into the space the car accelerated, fast. It crashed in to the two cement barriers at front of parking space. I heard the air hissing out of the right front passenger tire, as it deflated. The front of the car was badly damaged from the crash into the barriers. Luckily no one was injured or killed. This is the second acceleration problem we have experiencd. In May I had a deacceleration issue with this car. I was crossing traffic and when I pressed on the accelerator, it very slowly moved, not letting me accelerate. I was worried about the on coming traffic hitting me, but luckily they just honked and went around. Moments later Iaccelerated and the car worked normally again. We took it to the VW shop and they said they didn't find anything. That they "reset it". It had worked normally until today. The system that malfunctioned was the speed control. My safety and anyone around me was put at risk, by having a car accelerating when I didn't want it to. It's a Sunday, so don't know dealers response yet. Contacted insurance, police and will contact VW on Monday. No warning messages.