sng302

Hello,

Newly purchased a 97 sl500 40th. On the drive home once in a while after a pit stop and getting back into the car the alarm would go off. I hopped out and manually locked and unlocked the door a few times until it stopped.
Wondering what was I doing wrong or are the key fob batteries dead? I got 4 keys from buyer 2 of which are bayonet fobs. Looking at a manual online the fob pictured is different than mine. I have a single dime size button in center. Is this correct?
Learning the ways of my sl.

thanks
scottg