I had same problem for me it was the Door lock actuator was bad, I ended up ordering one online from www.vwpartsprime.com and my problem is gone. and I saved about 50 bucks for the same o.e. part from dealer.
I do want to mention i had to spend 100 bucks to find out that was my problem.
best of luck.
I do want to mention i had to spend 100 bucks to find out that was my problem.