Apparently my 1980 450 SEL had it's climate servo replaced with an electronic servo. I'm trying to figure out who made this and if there's any documentation. I was told by my mechanic that the fuse needed to be replaced awhile back, and it might need to be replaced again. Hoping to figure out how to replace the fuse without taking it to the mechanic. Thanks!
(https://i.postimg.cc/PvW2qPDC/IMG-9761.jpg) (https://postimg.cc/PvW2qPDC)
(https://i.postimg.cc/75sXbv5n/IMG-9762.jpg) (https://postimg.cc/75sXbv5n)
(https://i.postimg.cc/tsC2XR4g/IMG-9764.jpg) (https://postimg.cc/tsC2XR4g)
(https://i.postimg.cc/1fKvhVPT/IMG-9765.jpg) (https://postimg.cc/1fKvhVPT)
(https://i.postimg.cc/rdDjrhWX/IMG-9766.jpg) (https://postimg.cc/rdDjrhWX)
(https://i.postimg.cc/F7vTBVt3/IMG-9767.jpg) (https://postimg.cc/F7vTBVt3)
Looks like it might be the aftermarket servo from Unlimited Tools.
http://www.peachparts.com/shopforum/mercedes-benz-used-parts-sale-wanted/409408-fs-unlimited-tools-acc-ii-climate-control-upgrade-kit-other-climate-parts.html
Confirmed it's an early version of the Unlimited Tools kit. Thanks!