Audi A4 Cabrio cruise control no longer works

Hi, I once had a similar problem with my 2015 Audi A6. My car knowledge is intermediate, so please don't take my experience as a professional opinion. My garage identified the control unit as faulty. It was replaced and the whole fun cost me 1000 euros. Could you describe in more detail what error messages are displayed and how the car behaves differently? This could help to make a more accurate diagnosis.

(Translated from German)

Hey, thanks for the quick reply! The control unit, huh? Crap, that could be expensive. So the error message says something like "Cruise control error: function restricted". And the car, it just doesn't pull that well anymore, you know? It feels so underpowered and the acceleration isn't what it used to be. By the way, I already have 87654km on the clock, last service was at 85000km. Could that be the trigger?

(Translated from German)

Hi, thanks for the additional information. I'm not a mechanic, but this does sound like a problem I've had before. After my ECU broke, the car also felt like it was underpowered. The error message was similar, but didn't specifically address cruise control. I've also heard that mileage can play a role - my A6 back then had something similar to yours now. After the control unit was replaced, it ran like new again. Unfortunately, it's difficult to say whether this will be the case for you, but it could be. It's best to make an appointment at your trusted workshop and have it checked. If it's been a while since the last service, it might be time for an inspection. Sometimes it's just minor things that cause the car to become so paralyzed. Good luck with it, hopefully it won't be as expensive as it was for me.

(Translated from German)

Hi, thank you for the second explanation, that makes sense! It is of course annoying that such a mess can happen with the control unit, but at least there is a possible solution. I will follow your advice and make an appointment at my garage. I'm a bit nervous about the possible costs, but I hope it won't be that bad. And who knows, maybe it's just a minor thing that's slowing my car down. I'll keep you posted on how it goes. Thanks again for your help!

(Translated from German)