I have a 1973 450SL, which is now in absolutely gorgeous condition, however I recently found an area of rust, and would like to get some opinions as to how best to proceed with a repair. This is the only rust that I have been able to find, and believe me, I have looked everywhere.
The area, as shown in the following photos is located at the drain area on the passenger side of the car, in the Blower compartment. One way would be to cut the whole section out, and replace it with a section cut out from another car, but I really don't want to go that far.
I was thinking that perhaps one way to handle this would be fiberglass and then POR-15. The fiberglass could cover the whole area and then down into the hose fitting (using fiberglass cloth for reinforcement around the hole), or perhaps using POR-15 may do the whole trick by itself. Don't really know.
This problem was caused by a kink in the drain hose. I have now cleaned out the drain hose and removed the kink that caused the problem.
It is my understanding that the drain holes in the blower compartment drain off water that seeps in from where the wiper arms enter the cowl. I wouldn't have thought that water would enter from the wiper arm area, but if that's the case, so be it.
Here are the Photos:
This is a shot taken of the underside, where the hose attaches to the fitting:
Again, any help would be appreciated.
Here is an example of a situation which was much more extreme that what I have, and in this case the whole Blower compartment was replaced with one from another car - see This Post
That was a complete replacement, and cost a ton of $$$$.