Benzmac previously stated:

"It is spelled out in the owners manual!
1) key off, all doors closed.
2) key on, push button two times.
3) key off, push and hold button and turn key on , wait 15 seconds."

He does not mean the unlock or trunk switch! It's one of the button ons on the instrument cluster. Not sure which one, I think maybe O or R, which ever yours may be.

Good luck.

And you should invest in an owner's manual! They are only $10 and WELL-WORTH IT.

__________________
2006 E350 w/ 155k miles (Daily Driver)

Previous:
1993 300E 3.2L Sedan w/ close to about 300k miles
2003 E500 Brilliant Silver (Had 217k miles when totalled!)
1989 300E with 289,000 miles (had for <1 yr while in HI)
03 CLK 500 cabrio (Mom's)
2006 C230k (Dad's)
1999 S420 (Mom's/Dad's)
2000 C230k Sport sedans
2001 CLK320 Cabrio (Mom's)
1995 C280 My First Mercedes-Benz... (155k miles. EXCEPTIONAL AUTOMOBILE. Was Very hard to let go of!)