Let's see if I understand, say you have it on channel 230 with show A and all of a sudden it cuts to show B from another channel but you are still on 230?

If so, then no, I have not experienced that.

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2009 ML320 Bluetec
1985 300CD
1981 300TD

Past Mercedes
1979 300TD
1982 300TD
2000 E320 4Matic Wagon
1998 E430
1984 300SD
1980 300SD