Mercedes-Benz M104 2.8–3.0L Inline-6 Petrol Engine

Description

For sale is a used Mercedes-Benz M104 inline-6 petrol engine, available in 2.8L and 3.0L variants, widely regarded as one of Mercedes-Benz’s most refined and powerful naturally aspirated straight-six engines of the 1990s. This engine was removed from a donor vehicle and inspected prior to listing. It remains in good used condition, showing only normal wear consistent with proper use and maintenance. The engine is supplied as a long block and is suitable for direct replacement, restoration projects, or rebuild preparation.
The M104 series is known for its smooth power delivery, strong top-end performance, and robust engineering. With its advanced multi-valve design and solid construction, it delivers both reliability and enjoyable driving dynamics while maintaining Mercedes-Benz’s traditional refinement.

Performance & Reliability

The M104 engine features a dual overhead camshaft, 24-valve aluminum cylinder head, cast-iron block, and Bosch fuel injection system, allowing efficient airflow and responsive throttle behavior. Prior to removal, the engine operated normally with no abnormal knocking or excessive smoke. During inspection, the following checks were completed:
Engine rotates freely
Compression remains even across cylinders
No visible cracks in block or cylinder head
Oil passages and mounting surfaces intact
The M104 is respected for its durability and long service life when maintained correctly. Its design allows for smooth operation at both low and high engine speeds, making it suitable for daily driving and long-distance use. When installed in its original application, it integrates directly with factory cooling, exhaust, and transmission systems.
This engine is suitable for stock restorations, daily driver replacements, and classic Mercedes performance builds. It also provides a strong foundation for preventative maintenance or mild performance refresh projects.

Fitment

Fits in:
Mercedes-Benz W124 E280 / E300
Mercedes-Benz W202 C280
Mercedes-Benz W210 E280 / E320
Mercedes-Benz W140 S280 / S320
Other models originally equipped with the M104 2.8L or 3.0L engine
This is a direct-fit engine for the above models when installed with correct accessories and wiring. No modification is required when replacing an original M104 engine. Buyers should confirm engine displacement and compatibility with their specific vehicle before purchase.

Warranty & Installation

This engine includes a 6-month limited mechanical warranty, covering internal engine components under normal operating conditions. External accessories, sensors, gaskets, and wear items are not covered due to prior use.
Professional installation is strongly recommended. During installation, it is advised to:
Replace engine oil, coolant, and filters
Inspect timing components and seals
Check fuel injection and ignition connections
Perform an initial test run before regular operation
Proper installation and servicing help ensure reliable performance and extended engine life.

If you are looking for a genuine Mercedes-Benz M104 2.8L–3.0L inline-6 petrol engine, this used unit offers smooth performance, correct fitment, and excellent value for classic Mercedes ownership. It is an ideal replacement for worn or damaged engines while preserving factory specifications and driving character. With proven engineering and solid condition, this engine is ready to return your vehicle to reliable servic