Well, I figured it out. I must hold the trunk release button on the remote for a relatively long time compared to other cars I have owned. The trunk releases after holding the button for about 3 seconds.

__________________
Thank You!
Fred
2009 ML350
2004 SL600
2004 SL500
1996 SL600
2002 SLK32
2005 CLK320 cabrio
2003 ML350
1997 C280 Sport