You have had some detailed responses from knowledgeable people. One thing I would add is when you have something repaired you are from that point on dependent upon the quality of worksmanship (or workswomanship) of the person doing the repair. Chances are that person is not as experienced nor as well trained as the guys (and gals) of AMG.

From what you have described, which could be just the tiny peak of the iceberg and speak of the care the care has received in general, I, personally, would not be at all tempted and move on quickly.

Check through the classifieds here. There have been some nice cars posted.