I'm running a VVME slim kit with 5000k bulbs on my 2007 Tourer. They work fine, a nice upgrade comapared to Halogens. But, compared to my 2006 Type-S Sedan with OEM Xenon they are rubbish :)
You can't compare a Xenon kit against a Mercs "LED matrix" (or something) lights that ze Germans spent...