M104 AMG 3.4-Liter 24V Engine & 722.5 5-Speed Automatic Transmission – Rare Matching-Numbers AMG Set

Offered for sale is an exceptionally rare, number-matching AMG drivetrain, consisting of the legendary AMG M104 3.4-liter 24-valve inline-six engine paired with its original 722.5 5-speed automatic transmission. This complete engine and transmission combination was factory-built for a 1992 Mercedes-Benz 300CE 3.4 AMG, a true pre-merger AMG model highly sought after by collectors and restorers.

The donor vehicle spent its life across Germany, Japan, the United Kingdom, and the United States, and was acquired from a known collector. The engine and transmission were removed together in preparation for an engine swap, preserving their original pairing and provenance.

Engine Details

• Engine Type: AMG M104 Inline-6, DOHC, 24-valve

• Displacement: 3.4 liters

• Fuel Type: Petrol

• Factory Output:

  • 268 hp

  • 243 lb-ft torque

• Engine Number: 104980-12-035697

• Mileage: 105,000 km (~65,000 miles)

• Condition: Used, complete, good working order

This is a genuine AMG-built M104 engine, complete and unmodified, representing one of the most desirable naturally aspirated AMG six-cylinder engines ever produced.

Transmission Details

• Transmission Type: Mercedes-Benz 722.5

• Gears: 5-speed automatic

• Market: European-spec (.5 variant)

• Transmission Number: 722501-03-764057

• Original Pairing: Confirmed via datacard

The 722.5 transmission was produced specifically for European-market AMG applications and remains originally matched to this engine.

Included Components

• AMG M104 3.4L engine

• 722.5 5-speed automatic transmission (mated)

• AMG M104 airbox

• Alternator

• Water pump

• Oil pump

• A/C compressor

• Engine wiring

• Exhaust manifolds

• Ancillary pumps

• Drive belts

• Additional associated components

Authenticity & Provenance

• AMG Data Code: 957

• Matching engine & transmission numbers

• Factory AMG specification confirmed by datacard

• Removed together from the original vehicle

Highlights

• Genuine pre-merger AMG drivetrain

• Rare number-matching engine and transmission

• Complete and original configuration

• Ideal for concours restoration or high-end AMG conversion

• Increasingly collectible AMG performance component

Ideal Applications

• Mercedes-Benz W124 / C124 AMG restoration

• Period-correct AMG engine swap

• High-end classic Mercedes performance build

• AMG collector or enthusiast investment

A rare opportunity to acquire an authentic, complete, and matching-numbers AMG M104 3.4L engine with its original 722.5 transmission—true collector-grade AMG engineering.