Today, I started the engine while I put warm water over the windows and frozen-shut doors and noticed that after a few minutes the auxillary heater was very smoky.
As I usually drive the car straightaway up to 40mph maybe it is normal and dissapates as I'm driving. Do you think this is normal or it needs taking out and servicing?
There are no fault codes, but I didn't have chance to check the live data at the time.
https://www.youtube.com/watch?v=4xxmNlDGC4w