Mercedes brought back the straight six to their engine portfolio after nearly two decades out of major use. It’s a classic engine, and I think it could do well in a classic car. But which one?

I most particularly like M-B inline sixes because they sound so good. Even BMW I6s can sound kind of noisy when compared to the pure aural goodness of something like an original 300SL.

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So I’m pretty excited to hear this new 3.0-liter unit. There’s lots of cool tech in it too, turbo’d and hybrid-ed to the tune of 408 horsepower.

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Mercedes is going to put this thing in the current S-Class. I myself would jam one into a C126 S-Class coupe. Those cars were at the top of the world back in the ‘80s, but they were along way from powerful by modern standards. They look brutish, I think one could deserve a really strong motor.

What would you swap a new Mercedes straight six into?