The engine code is located on the left hand side of the engine itself (as you look from the front) on the cam chain cover.I'd really advise against a blanking plate for the PCV system, seen more than enough cases of internal engine pressure exceeding limits and causing all kinds of issues. If it's operating normally, leave it or replace it with the latest revision unit;http://www.awesomegti.com/car/vw/golfmk5/ecs-oem-breather-update-kit-mk5-gti-pas-b6-jetta-2-0tIf you really want to go all out though, implement an oil catch can system, although they are a few hundred pounds but are the best of both worlds. No oil into the combustion while maintaining internal pressures.