Dealer said it may be the Mass Air since it is coding lean and rich at the same time.

Address 01: Engine
Controller: 4B0 906 018 P
Component: 1.8L R4/5VT G 0008
Coding: 07201
Shop #: WSC 30011
2 Faults Found:
17545 - Fuel Trim: Bank 1 (Add): System too Rich
P1137 - 35-00 - -
17536 - Fuel Trim; Bank 1 (Mult): System too Lean
P1128 - 35-00 - -
Readiness: 0010 1000

<ul><li><a href="http://www.ross-tech.com/vag-com/cars/fuel-trim.html">http://www.ross-tech.com/vag-com/cars/fuel-trim.html</a</li></ul>