Date registered: Dec 2004
Vehicle: CURRENT: 2011 SL550, 2002 C240 FORMER: 2007 CLK550 Cabriolet, 2001 ML320, 1984 300TD
Location: Birmingham, AL
Mentioned: 4 Post(s)
Quoted: 603 Post(s)
One other item on the trunk...to open it with the hard key, inset it into the lock and rotate it 90-degrees counter-clockwise, then pull the handle. For cars before MY2005 (and some late MY2004s), you can also rotate the key 90-degrees clockwise, then remove it and this will "valet lock" the trunk -it cannot be opened with the SmartKey RCL function or with the release button in the cabin.
EDIT: I checked this on my 2007 CLK and it has the valet lock function. According to dealer documentation, it was deleted with MY2005, but maybe it was added back later. Or, maybe it's still there on the cabriolet. Anyhow, that's another feature of the hardkey if the vehicle is equipped that way.
Last edited by rudeney; 11-21-2012 at 02:21 PM.