I did not have any issues with the springs, they were all solid. I got the parts from a few different places online, make sure you get the Behr parts when you can, it's the OEM and much cheaper than the exact same Genuine MB branded part. I've had to go Genuine for a few of the actuators, it depends on what you can find. I got mine from FCPEuro. For anyone wondering, I paid somewhere between 300-350 for all the parts + shipping, and it's 100% worth doing all of them, you don't want to have to pull the dashboard off a second time. To be fair though, now that I've done it once, it would take me much less time to do it a second time.Good to know. I go by "fatherfixit" for good reason, but unfortunately I am recovering from rotator cuff surgery on my right shoulder and will need to have someone do it for me this time (it gets hot here in the summer and I'll need the ventilation working). Did you test the actuators before replacing them or just do them all as a matter of course? Where did you get the parts? Also what about that fresh air/recirculate door - were there any issues with the return spring on yours?