I have tried nearly every option for importing a VW model into SketchUp, and recently found software that does a good job. 'Transmutr' is a standalone application (not a plugin for SU.) See below for a comparison of various VW export/SU import approaches. Many of them fail to include the line work, so I've shown the results in both SU 'Default Style' and 'Hidden Line' to illustrate. I feel like Transmutr is the way to go, at least at present.