Has anybody got this feature and how effective is it ?? My C207 has 19" alloys and on some roads it would be nice to soften the suspension somewhat. Although MB have added 19" alloys to all C207's they still list the DHP as an extra @ £550. I've just found the only C207 (E400 excluded) I've seen with DHP in over two years of looking on the MB website and I'm tempted to swop mine for it.