I am also a new owner of a 2015 Evoque. I have a 2010 LR2 and love it but had to have the Evoque, but the service engine light came on and only had it about a month.
The service engine light came on, code read that the aux battery needs to be replaced. Is a dealer the only place that i can get a replacement battery from. I was quoted $289, seems pretty high for a secondary battery and even more for labor. Does anyone have a part number for this?
Are asking about the "auxiliary" battery mounted on the passenger side behind the glove box, and not the stop/start battery mounted next to the main battery under the hood? If so, have a look at the thread below from the UK Evoque forum. Doesn't take much for a DIY replacement.