S-Class (W140) 1991-1999: 300 SD, S 350TD, 300 SE 2.8, S280, 300 SE 3.2, 300 SEL 3.2, S320, S320L, 400 SE, S420, 400 SEL, S420L, 500 SE, S500, 500 SEL, S500L, 600 SE, S600, 600 SEL, S600L, 500 SEC, 600 SEC

Radio Error code 2 on a 93 500SEL

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Old Nov 3, 2004 | 12:37 PM
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EG1
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Radio Error code 2 on a 93 500SEL

Hey all,
A buddy of mine just picked up a 1993 500 SEL with a brand new motor. Lucky him! We are fixing a few little things and this error code came up on the radio. The battery was disconnected and we had to enter the code that I got from dealership. Now the radio doesn't work at all and E 2 keeps flashing....
What gives? Do we need a new radio?
Thanks
EG
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Old Nov 4, 2004 | 09:19 AM
  #2  
loveit_but_hate's Avatar
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S320
The Becker two-piece radio has a self-diagnostic system. The system verifies data exchange via the BUS cable between the dash mounted radio control module, CD changer and trunk mounted tuner/amplifier. If a fault is detected, a DTC E1 thru E5 will appear on the radio display panel.

The code E 2 for the becker audio is as follows:

Possible Cause:

Radio control module, CD changer and tuner/amp will not turn on due to open circuit or poor BUS connection

No voltage

Remedey:

Check BUS cable connections on radio control module and CD changer
Check for continuity between pins on BUS cables
Check condition of fuse on rear of CD changer and tuner/amp
Check for circuits 15, 30 and 31 at the radio control module, CD changer and tuner/amp
Replace tuner/amp

Last edited by loveit_but_hate; Nov 4, 2004 at 09:27 AM.
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