Intake air at COLD temps

[PanzerSD]

How can I make or allow the air being drawn thru the air filter to be warmed slightly at VERY cold temperatures? It's -30 outside, and unless I put card board in front of my radiator, my K-Jet Sensor plate ices open and floods the engine once the throttle is let off.
way back I've seen cars that have heater pipes coming from a shroud on the exhaust manifold and drawn in by the engine. had Mercedes ever tackled this problem? I'd need to make a shroud and stuff...