DIY'd the B1 service this morning and also decided to clean out my MAF sensor with some MAF sensor cleaner. Heads up to the DIYers, this threw a bunch of errors for me. A friend of mine brought over his BlueDriver and it pulled up 2 or 3 MAF sensor errors. I drove the car around for 3 minutes after all the errors showed up (e.g., ACC, Collision Mitigation, VSA, Parking brake, Emissions error, etc.) and it all cleared itself.

Edit: thinking back, I think I may have noticed my possible error. While the MAF was out, I turned the car electronics on and that's when the error codes started. At first I thought it was the battery, but I just had a brand new battery put in about 2 months ago.