S55 AMG, S65 AMG , S63 AMG (W220, W221) 2001 - 2013 (Two Generations)

S55 Radio keeps cycling ON/OFF

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Old Aug 21, 2018 | 05:22 PM
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S55
S55 Radio keeps cycling ON/OFF

recently purchased an S55 and have an issue with the audio/headunit and I'm tired of banging my head against the wall.

The headunit just cycles on/off constantly, every once and a while i will get sound for a few minutes, then it will just shut right back off.
I purchased the "MOST bypass tool" with no luck at all. I've spent several hours researching how to diagnose this system, read countless posts about the same issue and cant get this figured out.
I did the red light check and ended up replacing the Amplifier and my problem still remains.

Thus far the car has been nothing but a nightmare.


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Old Aug 22, 2018 | 10:00 PM
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From: Phoenix
222 S-65
My E-55 did this. Turned out to be a fuse that had a poor connection where it slides into the fuse box. Replaced command for that. Doh!
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