1992 300E Becker radio failed. Antenna goes up. No signals received. Rebooted by disconnecting battery. Entered radio code. Radio works for a few seconds and shuts off. Error code E2 shows on the radio. Checked fuses and the 7.5 amp fuse on the turner in the trunk OK and have 12 volts going to the turner in trunk.
Car has been sitting for about 4 months. Any thing else I need to check or do?

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Handyjay

Troubleshooting the 1991-1993 Multi-Component 1432 Systems

Error Codes "E CODE"

"NO DISPLAY"
1 Input Power to the HEAD UNIT(dash mounted) is missing. Check with volt meter to test for 12 volts
2 Fuse of the HEAD UNIT(dash mounted) is open, Replace it with a 5 amp fuse
3 HEAD UNIT(dash mounted)is defective

"E1"
1 HEAD UNIT is defective

"E2"or "E3" (Without CD Changer)

1 Input Power to the RECEIVER UNIT (Trunk mounted) is missing, Check with volt meter to test for 12 volts
2 Fuse of the RECEIVER UNIT (Trunk mounted) is open, Replace it with 7.5 amp fuse.
3 The BUS CABLE (gray colored) that connects to HEAD UNIT(dash mounted) to the RECEIVER UNIT(trunk mounted) is not connected or is defective.
4 RECEIVER UNIT(trunk mounted) is defective.

"E2 or "E3" (With CD Changer)

1 Input power to RECEIVER UNIT (Trunk mounted) is missing, Use a voltmeter to test for 12 volts
2 Check the RECEIVER UNIT for an open fuse and replace with 7.5 amp
3 Input power to the CD CHANGER (Trunk mounted) is missing, check with volt meter to test 12 volts
4 BUS CABLE (gray colored) is defective or disconnected,
5 CD CHANGER is defective, Disconnect the CD CHANGER from the HEAD UNIT, if the E2 code disappears, Replace the CD CHANGER,
6 RECEIVER UNIT (Trunk mounted) is defective.

"E4"

1 RECEIVER UNIT (Trunk mounted) is defective.
2 CD CHANGER (Trunk mounted) is defective. Remove the CD CHANGER If the E4 code disappears, Replace the CD CHANGER

"E5"

1 RECEIVER UNIT (Trunk mounted) is defective

I was wondering, is there any way I could use the radio without plugging the amplifier cable and not getting this error (E2), because I don't have one and I would like to use and aftermarket amplifier connected directly to a low level audio signal from the board?

The head unit is just a pushbutton unit with a cassette player in it. It does nothing but send data to the tuner unit in the trunk. The trunk unit is the actual radio that generates all of the audio with these multi-piece radio setups. You can pull audio from the trunk unit, but you cannot use the head unit by itself since it's basically just a pushbutton unit. See your other thread in the multimedia section, I gave you a more detailed reply there.
Becker Grand Prix 1432 Aftermarket Amplifier

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Current stable:
1995 E320 149K (Nancy)
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Gone but not forgotten:
1986 300SDL (RIP)
1991 350SD
1991 560SEL
1990 560SEL
1986 500SEL Euro (Rusted to nothing at 47K!)