Today, and I think previously, the factory cell phone in my 1992 300CE was cycling on/off both before and after cutting the car off with the key., and would have killed the battery if left that way.

I pulled the fuse box cover, but could not find a fuse that had "phone" listed. I pulled #4 (radio) but the phone did not die! I pulled the neg batt cable to kill it.

Anyone have any idea which fuse it should be?

Also, the phone and/or security system has a nasty habit of locking the car by itself!

I sure would like to delete the phone, is there a "module" somewhere to unplug/remove in addition to the handset in the center console?

The darned thing interfaces to a speaker, very annoying repeated loud beeping when the phone goes into hysterics.

The car does have an operational aftermarket radio, but the phone still feeds into a speaker somehow.

Any help would be appreciated.