My CLK is the same way. It's actually a good thing. Keyless entry and car alarms with LONG range are actually more prone to being cloned because of the bandwidth that these units work on. The wider the range the more susceptible it is. So you are actually better off with a closer range.
BenzWorld.org forum is one of the largest Mercedes-Benz owner websites offering the most comprehensive collection of Mercedes-Benz information anywhere in the world. The site includes MB Forums, News, Galleries, Publications, Classifieds, Events and much more!