From the pics and the decription it looks like a nice car. I wouldn't pay more then $3k for it though, their are a lot of 300D's around.

The rear tail light could be found through someone on this site, or at a junkyard. The wood looks like a fast fix also. The rust spot does require a little further investigation.

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1999 SL500
1969 280SE
2023 Ram 1500
2007 Tiara 3200