Hello, after leaving the post here about the radio, Mercedes changed my radio head unit to a new one and it's working fine.

But

When I turn the key to the left and removed the key, radio is turning off.
However, when I pushed the power button after that , radio starts to run.

I think radio isn't supposed to work when your key is off.


wait for your input, please.

 

Mine works like that, check your manual, i think when the battery is getting drained too much it will shut off the car deck on its own

 

I also changed my battery to a new one recently under warranty.

It's not shut off.

I can turn ON the radio when the key is out.

 

yes you can turn on the radio when the key is out...but the deck auto shuts off after a while

It'll show up a message saying something like Turn on your car engine or the radio will turn off in 3 minutes

 

Thanks, oh..so it's NORMAL.

 

You have approx 30 minutes of play time with the key off. This is normal.