BLAUPUNKT radio mute and volume haywire

Suspect a steering wheel control issue if the volume will work directly from the radio itself.

As far as I know, it has a sensitive volume control, so sometimes the user touch that area by accident.

When you turn the radio all the way up to max volume does the amp turn off ? you could have a short or a blowen speaker which is making the amp go into protection mode. i would disconnect all speakers then try one speaker by itself and see if you have full sound again... go through this process untill the sound stops again.

There should be a button labeled ATT that is your mute button. Att is short for attenuation.

Try a full reboot.

Remove the battery (or fuse) for 30 minutes.

Replace ......then enter the code.

If you do not have the code , post the SERIAL NUMBER (usually beginning with M * * * * * * ) found on a label on the radio casing

With me. I pressed the + volume button once from 13 to 14 and it went all the way to 30 ( highest volume) and wont go back down. it also wont let me go to the radio now

I would think this would be caused bu a defective rorating contact under the sterering wheel, 99% of time that is the problem.

I'm having the exact same symptoms and have had the same luck online. My guess is that the logic got fried during the "brown out" while trying to crank the engine on a very low battery. I thought I might find something about the "VF" and "SK" modes that it is getting into (pretty cool if I weren't missing my radio stations). I'm guessing they are European bands or something. Also getting into a CD changer mode - funny since this was a pretty low-end cassette tape model. My Cancun is 12 years old. What I'm going to try (when it stops raining) is to disconnect the battery leads for 15 minutes or so and then reconnect to see if that clears out the radio memory (if I could easily identify the correct fuse, that would make the process much easier but, alas, I can't). Let me know if you have tried anything else and I'll let you know if my attempt works.