Hi everyone, I just completed this on my 335 MT. This is a great write-up. A few points I'd like to underscore:
1. For the manual transmission, you do not need to remove the intercooler. Looking up under the car, on the passenger side, you'll see a coolant hose going into the radiator. There is a clamp on this. You can loosen it, pull it, drain it, and then replace. Easy.
2. For the bleed: it's very important the key is in the dash, ignition on (i.e. headlights are on), and both temp dials turned to high (84 degrees). As stated above, push the accelerator pedal in for ten seconds or until you hear the water pump cycle on. Then let it go. I used this time to replace the undertray.
Thanks for a great write-up!