The 1.8T sludge issue seemed to be with the longitudinal mounted cars. I've never seen a GTI/Jetta/Beetle with that issue. Even then using the bigger diesel oil filters seemed to help.
If you decide you want a 9mm, look at the sig P938. Mine fits in my pocket pretty well.
http://i991.photobucket.com/albums/af40/ted_kennedy/Gun%20Stuff/2A0E7307-F4CC-4BD8-9796-79D85BA61E0F-8840-00000423A7A1AF0B.jpg
Guy at work is selling an HK USP 9mm compact. Never shot a compact HK but they seem to get great reviews. Anyone have any experience? The price is almost too good to pass up.
For reference:
http://clydearmory.com/media/catalog/product/cache/1/image/9df78eab33525d08d6e5fb8d27136e95/c/l/clyde_armory_hk_usp9c_v7.jpg