In this video review, I will compare the Mercedes-AMG M156 6.3 engine to the M157 5.5 Biturbo engine and see which is best - All while showing two W212 E63s. I will look at technology/design, sound, performance, and reliability before concluding with which of these two engines is best in my opinion. The M156 was in cars like the C63, E63, and CLK63 while the M157 was in the E63 and S63

(4K HDR) Shot on the new Panasonic S5 with Sigma Art 24-70 2.8.

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