So this is the first vehicle I've ever owned with heated mirrors, and I was curious: 1) do they always come on automatically? 2) How long does it take them to actually heat up?

My driver's side mirror was fogged up/condensated this morning, it very very slowly got slightly clearer as I drove to work (20 minutes away). By the time I got to work it was much less fogged but still not all gone, just wondering if that's normal?

 

On vehicles equipped with rear window defrost, the heated exterior mirror glass and if equipped, the heated trailer tow spotter mirror glass operates when the rear defrost system is activated.

On vehicles equipped with heated mirrors only, the heated exterior mirror glass and if equipped, the heated trailer tow spotter mirror glass operates when the heated mirror button is pressed on the FCIM (front controls interface module).

The heated mirrors are heated for a period of 10 minutes when the engine is running and the defrost system is activated.

The LH (left-hand) and RH (right-hand) heated exterior mirror glass voltage is supplied by the rear window defrost relay through BJB (battery junction box) fuse 63 (15A).

On vehicles equipped with a LH (left-hand) exterior auto-dimming mirror, the LH (left-hand) exterior mirror glass takes longer to defrost than the RH (right-hand) exterior mirror glass due to differences in the mirror glass thickness.

If equipped, the rear window defrost can also be commanded on and off using voice commands or by touching the rear window defrost button located on the touchscreen interface ( FDIM (front display interface module) ). For additional information on voice or touchscreen commanded features, refer to the Owner's Literature.

 

Ahhh you have to hit the rear window defrost button? Makes sense. I was going to look in the manual but did not have time to do it this morning. Thank you!