M104 AMG 3.4-Liter 24v Engine & 722.5 5-Speed Automatic Transmission

Offered here is a rare and highly desirable AMG-tuned M104 3.4-Liter 24-Valve Engine paired with the 722.5 5-Speed Automatic Transmission — a complete high-performance powertrain package from the golden era of AMG engineering.

Based on the legendary Mercedes-Benz M104 platform, this AMG-modified 3.4L variant represents one of the most balanced and responsive six-cylinder performance builds ever produced by AMG during the pre-merger and early partnership years with Mercedes-Benz.

When paired with the robust Mercedes-Benz 722.5, this setup delivers smooth yet authoritative power delivery — ideal for both executive touring and high-speed Autobahn performance.

AMG 3.4L M104 – Engineering Overview

The AMG 3.4L version of the M104 featured significant performance enhancements over the standard 3.0L variant, often including:

• Increased displacement (3.4 liters)

• Higher-performance camshaft profile

• Revised cylinder head work

• Optimized engine management tuning

• Upgraded intake and exhaust flow characteristics

The result is stronger mid-range torque, improved throttle response, and a distinctive AMG power band that transforms the driving experience.

Depending on specification, output typically exceeded factory M104 figures, delivering a more aggressive and performance-oriented character while maintaining Mercedes refinement.

722.5 5-Speed Automatic Transmission

The electronically controlled 722.5 transmission offers:

• True 5-speed overdrive capability

• Improved highway cruising efficiency

• Smooth yet firm AMG-compatible shift characteristics

• Excellent durability under higher torque loads

This transmission is highly desirable for performance builds due to its balance between comfort and strength.

Key Features & Benefits

• Genuine AMG-spec 3.4L M104 inline-six

• Paired with 722.5 5-speed automatic transmission

• Ideal for OEM+ AMG restorations

• Perfect for performance swap projects

• Smooth power delivery with strong torque curve

• Period-correct 1990s AMG engineering

• Increasingly rare complete drivetrain package

Ideal Applications

This AMG powertrain package is highly sought after for:

• W124 E-Class builds

• C124 coupe restorations

• R129 SL performance upgrades

• W201 190E high-performance swaps

• Period-correct AMG recreations

It delivers the perfect combination of classic Mercedes mechanical strength and AMG performance tuning.

Collector & Investment Value

Original AMG engine packages are becoming significantly harder to source, particularly complete engine and transmission pairings.

As appreciation for 1990s AMG vehicles continues to rise globally, authentic AMG powertrains offer:

• Strong enthusiast demand

• Increasing long-term value

• Authenticity for high-end builds

• Significant resale enhancement

Complete AMG drivetrains are far more desirable than standalone engines due to originality and matching performance engineering.

The Ultimate 1990s AMG Inline-Six Upgrade

The AMG M104 3.4L 24V Engine & 722.5 5-Speed Transmission represents a rare opportunity to acquire a true piece of AMG performance history.

Balanced. Refined. Powerful.

Secure this complete AMG drivetrain package for your restoration or performance project.