I think my car is your car's twin.
This is going to sound weird - turn the climate control to off (right most button). Then, turn the ignition on.
I think, that is what worked for me. btw...this phenomenon won't happen all the time...once you get it back to "normal" it will work fine for weeks or even months, and then one day, you look at it cross-eyed, and it does that blinking light/radio won't work/locks won't work, thing.

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It is a truism that almost any sect, cult, or religion will legislate its creed into law if it acquires the political power to do so. Robert A. Heinlein


09 Jetta TDI
1985 300D