I did a little digging for more info and VW sent me this email:
"..I've reviewed with our EV Guide team and as promised, I'm following up with information about our thermal system in the ID.4. I'm able to confirm that it does not have an active thermal control system in that it does not cool differently depending on whether it is summer or winter".
Have a good rest of your day and stay safe!
Digital Operations Advocate, Volkswagen Customer CARE
Volkswagen Group of America
I think the VW person might have misunderstood the question. From a Jalopnik article on the MEB platform (The Fascinating Engineering Behind VW's Electric Car Platform of the Future (jalopnik.com)
"The motor unit and battery pack are both liquid cooled, with the latter in a low temperature loop that includes a chiller (a refrigerant-to-coolant heat exchanger that allows for additional cooling beyond what a passive water-to-air radiator at the front of a typical automobile could offer) and the former in a high-temp loop.
You can see the coolant hoses going to the motor in the photo above the previous one, and here’s a look at where the coolant lines enter and exit the front side of the battery pack:"
"I didn’t have a chance to take a close look at the model’s cooling module (the stack of heat exchangers at the front of the car), but VW did say that there’s only a single radiator at the nose. This makes me think that the design is much like the Tesla Model 3's, which has one air-to-water radiator up front, along with an air-to-refrigerant condenser for the battery chiller (you can see the Tesla’s full schematic here
"And indeed, in the press image below and the photo above, I do see two heat exchangers, which back up that hypothesis, though I will say that, when I spoke with a VW engineer at a round table at the LA Auto Show in November, he seemed strangely hesitant to discuss the particulars about the cooling module.
And in an email with VW’s PR rep, I was told that the company wasn’t ready to discuss it further, making me wonder if VW’s got some kind of clever battery and motor cooling design brewing."
Seems like a pretty good system that is robust. And maybe something more going on than they have released