My cruise control has gone out in my A4.

Is this a common problem?

How would I go about troubleshooting this?

I checked the vacuum hoses to the cruise control unit. They seem to be fine. The linkage is attached to the throttle body. I can't visually find anything wrong with the cruise control.

Thanks so much for any help you can provide.

- Brian

 

Likely your control stalk on the column is dead. It's not that uncommon. There's also a control module above the glovebox that can get cracked solder joints. Heating the board to re-lay the solder sometimes fixes it but my bet is the column switch.

 

Not 100% but there should be a fuse for your cruise control. Make sure it is good!

 

The fuse for the sunroof has been removed, because there was a problem with the sunroof. Are the sunroof and cruise control on the same fuse by chance?

If it's not the fuse, then I imagine it's the column switch like Devil said. Thanks!