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It seems that Mercedes is headed towards some dark days now that they are facing a class action suit due to alleged defects in the M156 V8 motor. Reports coming in are stating that there seems to be a premature wear that occurs as a result of the material used in the camshafts. Let’s break it down a bit more.
Mercedes’ V8 AMG engines have cast nodular iron camshafts, but the valve lifters are made of 9310 grade steel. The complaint is that this combination of materials is contributing to premature wear of the M156 motors. This can be due to improper heat treating of the metals or improper offset. Seems like an easy fix, but the problem is that the company has known about this issue since 2007 when a service bulletin was released by Daimler, but the company has failed to take action on the matter.
This 6.2 liter V8 engine is used in models such as the C63 AMG Coupe, the ML63 AMG, and the SLS AMG supercar. In these vehicles, it can develop between 450 to 570 HP.
At this time, there is only one plaintiff who is alleging financial losses of about $25,000. Sometimes tells us this is going to snowball into many, many more people coming forward with the same problem. We’ll keep you posted as more details surface.
Mercedes is smacked with a Class Action Suit due to alleged V8 AMG defects originally appeared on topspeed.com on Friday, 23 September 2011 18:00 EST.
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