all the repeat head gasket failures i've seen over the years have all been elring. me and other techs in my area have all agreed that reinz and goetz are a better gasket. just because the manuf uses elring doesn't mean they are the best. some may disagree. i can only speak for what i see going in and out of my shop.
paul

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Paul Roberts
Mercedes Centrum Inc.
Bellevue,WA.