2012 Passat B7 with 2.5L, 109,000 miles. Serviced regularly, last brake flush was about a year and 10,000 miles. Wife mentioned she felt the brake pedal nearly go to the floor but reponded when she released and pressed again. She has not felt this consistently but it has happened a few times. I drove it quite a bit and never experienced this. As I was checking things out I noticed that the vacuum pump was leaking oil, so that was replaced as well as a full brake pressure bleed just because. Old brake fluid looked decent and bled well with no signs of any air. Post service test drive was fine. I drove this AM and did experience what she described. The car was still relatively cold and it seemed to happen after coasting a bit.
Thanks in advance