Mercedes M273 5.5 & 4.7 V8 Engine – Specs, Problems, and Real-World Reliability!

Описание: The mid-2000s marked a pivotal shift in Mercedes-Benz engineering with the launch of the M273 V8 engine family—a series of refined, naturally aspirated 5.5L and 4.7L V8s designed to replace the aging but respected M113. These powerplants found their way into many of the German automaker’s flagship vehicles, including the S-Class, E-Class, CLS, and full-size SUVs. Built entirely from aluminum, with modern features like variable valve timing, electronic thermostats, and lightweight internals, the M273 series promised performance, efficiency, and innovation.

But for all its engineering ambition, the M273 also developed a reputation for premature wear, timing component failures, and intake system issues. In this video, we’ll break down everything you need to know—from the technical specifications and engine architecture to its common problems, maintenance tips, and overall reliability. Whether you're considering buying a used Mercedes with this engine or just want to know what made it tick (or rattle), this is your one-stop guide to understanding the M273 5.5L and 4.7L V8 engines.
Timecodes:
00:00:00 - Introduction
00:01:05 -Engine Design & Technical Overview
00:02:53 - Common Problems & Reliability
00:04:37 - Conclusion

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