The thing in the photo is the inside blower fuse (most likely).
The resistor is totally at the bottom of the well you are picturing. I have had two of the 126 cars catch fire from the dryed leaves that accumulate on top of it. We now consider vacuuming that area a part of our yearly servicing (if not done by the detailer).
Bosch Master, ASE Master, L1
33 years MB technician