akipal

I never paid attention before because of most hot weather in CA.
This morning it was pretty cold and I turned on heater and found that no air flowing in rear vents.
My S450 has only dual zone climate system.
I lowered temp and I feel cool air from all vents.
Once I change temp toward to HI, no air from rear vents.
I tried to closed all vents in front (since this is not 3 or 4 zone climate) then I do not get any air in cabin (still no air from rear vents)

SilberGrau57

Normal. Warm air to the rear comes from floor vents under the driver/passenger seats only