I received two keyfobs I bought my 2003 E-500 last month. Everything on the keyfobs seem to work fine, except for the red panic button. I can push, pull, and contort in different positions to try and get it to work... but it never will.

Any suggestions? Is there a way to "reprogram" the key or make sure it's paired correctly? Just FYI... I assume it is paired right since it unlocks the doors, cranks the car, etc... just drawing at straws here...

 

You have to hold the button down for a few seconds. Press it again to turn it off.

 

Yep, I made the same mistake. I guess the MB engineers wanted to make it nearly impossible for us to set it off by accident. Good luck!

 

One thing you never want to do is set it off in a closed garage. It nearly gave me a heart attack when I did it accidentally.