Pre-Merger AMG 3.4 Liter M104 Engine & 722.5 5-Speed Auto – Complete Performance Swap

Offered here is a highly desirable AMG-tuned M104 3.4-liter 24-valve engine paired with the 722.5 5-speed automatic transmission, forming a complete performance drivetrain package from the golden era of independent AMG engineering.

The Mercedes-Benz M104 platform is widely regarded as one of Mercedes-Benz’s strongest and most tunable inline-six engines. When enhanced by AMG, displacement was increased to 3.4 liters, delivering stronger midrange torque, sharper throttle response, and significantly improved overall performance.

Paired with the robust Mercedes-Benz 722.5, this setup provides both performance and drivability, making it ideal for period-correct AMG builds.

AMG 3.4 M104 – Technical Highlights

• 3.4-liter inline 6-cylinder configuration

• 24-valve DOHC head

• Increased displacement over standard 3.0L

• AMG-specific tuning and calibration

• Strong midrange torque delivery

• High-revving yet smooth character

Power output typically ranged around 270+ horsepower depending on configuration and application.

722.5 Five-Speed Automatic Transmission

The 722.5 transmission adds:

• Overdrive 5th gear

• Improved highway cruising efficiency

• Strong torque handling capability

• Smooth yet responsive shifting

This combination was commonly found in high-performance W124 and W201 AMG builds of the early 1990s.

Perfect For

• W124 AMG builds

• W201 190E 3.4 conversions

• Period-correct pre-merger restorations

• Performance-oriented classic Mercedes projects

• Collectors seeking authentic AMG drivetrain components

Collector & Investment Appeal

Independent-era AMG drivetrains are becoming increasingly rare, especially complete engine + transmission packages.

Why this setup is desirable:

• Authentic AMG displacement upgrade

• Complete matched drivetrain

• Period-correct performance configuration

• Increasing global demand for pre-merger AMG components

• Strong appreciation potential

As pre-merger AMG vehicles rise in value, original AMG engines are becoming centerpiece collector assets.