Has anyone piggy-backed an RF remote keyless entry system to a W140 IR RKE system? Seems like it's a matter of tapping into the right wires but that might upset the alarm. Does anyone have a wiring diagram to share (I have an alldata subscription but I can't follow the wiring diagram through separate pages)?

The early W140 RKE system is a little silly. I have to get the fob so darn close to the lock that I might as well use the key and the fob doesn't have a ring to hook to a keychain or serve as a keychain.

Thanks,
Sixto
95 S420
87 300SDL