SL/R231: XM Radio - "SOUND" grated out
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Joined: Jan 2016
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From: Brookshire, Texas & Cat Spring, Texas
2019 SL550/2023 EQS 580 SUV
I would disconnect the battery and see if that resets the radio. Having said that Mercedes appears to have some peculiarities with different models so wait until someone else who is more experienced to give the go ahead....
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AMG GTC Roadster, E63s Ed.1, M8 Comp. Coupe
