Thanks for the link. That looks like a very interesting car but I do have my doubts about the description.
this particular vehicle was sent to Germany in 1985 and was factory overhauled and modified by AMG resulting in a 60hp increase. It now boasts 346hp and has a top speed of close to 170mph. Also, while in Germany AMG Spoilers and sideskirts were added.The car returned to the U.S. and a complete metal restoration was performed
Why would someone spend the money sending a 10 year old car to AMG to improve its performance? Wouldn't it be better to buy a 560SEC at the time if performance was the main outcome?
The wheels are not AMG wheels but later model standard MB wheels. Again, if the engine was enhanced, wouldn't they also get better rims?
As for the front air dam and rear bumper, these look like non-AMG body kit that is still available today.
I don't mean to dump on this car but I do have doubts.
As for AMG mechanical modification, I have never seen details on what was available from AMG. I don't believe that AMG had a standard list of modification but rather would work on each car depending on what the owner wanted and what they were willing to spend. Mechanically, I am pretty sure AMG created larger exhausts and may have even worked on air intakes too but not sure what else was done.