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Ahh, indeed exactly what occurred. You tube it great to find out these things but in this case its not something youd search for when the car is saying all is good!! Th garage I bought the car from ultimately has paid the £727 bill for repairing the ABS ECU so all has ended well! The lovely people who fixed the car also gave me the full diagnostic report too, which was also nice. Thanks for your help, I am going to tell everyone I know about this potential money waste!!

That’s great and I think everyone who suffered the loss of channels has had them restored I would like to think that due to the communications and comments generated by all on the post decisions have been reversed.

Personally I only get Audi to do a service so the car to has a full service main dealer history- i get all the other repairs - brakes, tyres etc at a local garage that I have used for years - far more reasonable pricing.

Not sure if you can find a smoking gun so-to-speak. VCDS scan would be diagnostic tool of choice, and if error was previously logged but DTCs were not cleared, then that historic data will be there, including instances. I think that’s remote, but never say never. I assume this is brake servo pressure sensor error? Audi onboard computer says keep driving but seek service centre. Reality is that damages ABS as you’ve found out. Other avenues, speak to Audi to see if fault was previously logged with them on digital history. For VCDS to purchase, check out RossTech via Gendan. More details here on issue via Dave Sterl.

All my dab channels are back also.

My son (the tech wizz) reckons the MMI system will have been updated remotely. I would have though my 2016 A6 would have been before the technology? Audi offers remote firmware updates for certain models via over-the-air (OTA) technology. This means that you can update your car's software without needing to visit a dealership, according to Audi UK

I've just retuned the stations and they all seem to be working ! Really strange...

Yep, all working again. Would be good to know why it stopped, then started again!

All good here my friend! Thanks for asking