This is all interesting but I am still not sold. Mercedes redesigned the heads a few times on these so maybe even the Mercedes engineers were at a loss. Or their are a few things that combine to cause a good head go bad. Maybe the comdination of coolent, driving style, and overheating all cause these heads to crack. I don't think mileage on the head has much to do with it, however the more the better.

__________________
2016 Corvette Stingray 2LT
1969 280SE
2023 Ram 1500
2007 Tiara 3200