Mercedes M256 EXPLAINED: Why This Modern Mercedes Six Is Different!

In this video, Zach takes an in-depth look at Mercedes-Benz’s newer M256 inline-six and what owners can realistically expect for long-term reliability as mileage adds up, including how the 48-volt mild-hybrid system changes ownership compared to older Mercedes six-cylinders. He highlights where the M256 is most common—models like the E450, S450, CLS450, GLE450, GLS450, and G-Class inline-six variants—so viewers know what they’re actually shopping for. He also covers the most common problem areas without naming the exact issues, focusing on how they develop, the early warning signs he watches for, and why maintenance history matters more on a high-tech turbo six. Finally, he wraps with an honest reliability verdict and a practical ownership roadmap to keep an M256 running strong long-term. If you would like to read up on this engine more, we have a full M256 guide on our website: https://8020automotive.com/mercedes-m... 8020 Automotive Website: https://8020automotive.com/ Check Out Our Portfolio: Tuning Pro - https://tuningpro.co/ BMW Tuning - https://bmwtuning.co/ Diesel IQ - https://dieseliq.com/ Chevy Trucks - https://chevytrucks.org/ Porsche Mania - https://porsche-mania.com/ Muscle Car Club - https://musclecarclub.com/ New Videos Every Week. Subscribe so you don't miss a video! ►Subscribe Here: https://bit.ly/3xtNUph --------------------------------------------------------------------- What is 8020 Automotive? 8020 Automotive owns and operates a portfolio of content websites and eCommerce stores in the Automotive industry. We provide over a million monthly readers with high-quality automotive content, focused predominantly on technical and performance modification guides. --------------------------------------------------------------------- 00:21 – Mercedes-Benz M256 Inline-6 Engine Background! 01:15 – Most Common Mercedes M256 Engine Problems! 01:21 – 3.0T M256 Common Problem #1 – 48V Mild-Hybrid System 02:11 – 3.0T M256 Common Problem #2 – Carbon Buildup 03:53 – 3.0T M256 Common Problem #3 – Cooling System 05:12 – Mercedes-Benz 3.0T M256 Engine Reliability!