Also condensation in the back window, could be a window out job to fix
Check for readiness codes with vcds to make sure the mil light has not been reset prior to you arriving.
Car needs to successful driving cycles to set them
http://www.ross-tech.com/vcds/tour/readiness.html
Once you have checked the readiness you can then go ahead and clear any faults that are in the system before a drive and rescan to see if there are indeed issue with the car.