Removing the front inner fender, the cooler and the panels in this area:
As expected here are the most rust problems:
The tube 1 looks much bigger then 2, but 2 is original 1 was covered or replaced by a bigger one. Tube 4 is rusted through, 3 looks good at first but is badly repaired. So both must be replaced.
The problem in this area is a construction problem. Some panels are mounted at the tubes 3, 4 and 5. Everytime you drive through the rain water intrudes into these tubes via this mounting holes. The water cannot leave the tubes and the corrosion process starts from inside. The same problem still existed with the MK IV. A small hole drilled at the deepest point of these tubes solves this problem.