Last week I did the valve cover gaskets/breather reseal along with new plugs on my 01 E320 with nearly 240K miles. Today I was going to get the car finished up with a tire rotation and new brake pads on the rear. On 210 cars when I have the wheels off I always take a look at the spring perches. Today this is what I found on the drivers side. About a year ago I did notice some corrosion starting and never did anything about it. It looks like I need to take the car out of service until I address this. It appears to be separated from the leading edge to about the middle. I went ahead and removed the spring to get a better look (photos attached). Does this look like something that can be cleaned up and welded, or should I cut the old one out and just replace it (this is what I am leaning towards). The factory repair procedure is to pop rivet in the new one. What size rivets should be used?

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