We did not support Diesel cars when we launched two years ago. We do now. You can continue to use the device you have now if you car is model year 2006 or later, but please drive for a bit and let the firmware update to the latest version. The latest generation of the hardware supports Diesel as well.

It was very clearly mentioned in various places on our website that Diesel cars were not supported before we added support, but we're happy to give you a refund if you missed it and never got to use the product. Please send an email to support@automatic.com and point them to this comment and they'll take care of it for you.