Just updating this thread. I have just gotten off of the phone with my local Deutz distributor and will be picking up the intake manifold heater for my 2445 on Monday of next week. He quoted me $85.00 for the heating element itself (which he refers to as a glow plug), a push button switch for the dash, and a washer for the glow plug port. He told me it is easy to install, just run a fused line from a power source to the switch and down to the element. All that has to be done is that prior to cranking the engine, hold down the button for up to 30 seconds if it is 0 degrees, above zero the time to hold the button decreases, and crank the engine. After a few times, he says you will get the timing down. FYI: On all 1011f model engines, there is a provision already built in for this, two ports on all 4 cylinder engines and 1 port in all 2 and 3 cylinder engines. He says most with four cylinder only use one element anyway.
The other option is a heater that goes on the pan, but he did not feel like this is a very safe route as there is no thermostat.
Happy Holidays!
Bill