Aftermarket immobilizer ~1993
I've a 1993 CL500 (C140) with an after market immobilizer, it works fine but one of the two transponders/fobs is broken and I'm getting kind of paranoid loosing the one that works.
So, I need help to identify the type of immobilizer so i (hopefully) can get a spare transponder and replace the broken unit or documentation in how to remove it.
Pictures of the transponder and window sticker



