The 6.4L was a response to several reliability issues which the 6.0L PSD had, as well as new, more strict emissions standards for light duty diesel trucks.These issues can actually be more costly to repair than those on the 6.0L, leading many owners to consider replacing their 6.4 L powered Super Duty trucks with a different make. This is generally not the most economic option, since the original purchase price of these trucks is very high, and has depreciated significantly due to the reliability concerns surrounding the engine.
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2013 MERCEDES BENZ SL-CLASS