Mercedes-Benz AMG M104 3.4L 24V Engine & 722.5 5-Speed Automatic Transmission – Complete, Matching Numbers

Offered is an exceptionally rare and highly desirable AMG M104 3.4-liter 24-valve inline-six engine paired with its original 722.5 5-speed automatic transmission, removed together from a 1992 Mercedes-Benz 300CE 3.4 AMG. This drivetrain represents a true pre-merger AMG factory build, identifiable by the AMG data code 957 and confirmed matching engine and transmission numbers.

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 simultaneously in preparation for a swap and are being sold as a complete, mated set.

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

• Operation: Turning over (video available)

An authentic AMG M104 airbox is installed and included. Two plastic rivets were damaged during shipping; this is cosmetic only and easily repairable with epoxy.

Transmission Details

• Transmission Type: Mercedes-Benz 722.5

• Gears: 5-speed automatic

• Market: European-spec (.5 variant)

• Transmission Number: 722501-03-764057

• Original Pairing: Factory-matched to this engine per datacard

Included Components

• Engine & transmission (mated together)

• AMG M104 airbox

• Alternator

• Water pump

• Oil pump

• Power steering pump

• A/C compressor and A/C lines

• Exhaust manifolds

• Engine wiring

• Drive belts

• Engine mounts

• Transmission mount

Key Highlights

• Genuine pre-merger AMG 3.4L M104

• Matching engine & transmission numbers

• Rare 722.5 European 5-speed automatic

• Complete, unmodified drivetrain

• Ideal for concours restoration or high-end conversion

• Highly collectible AMG specification

Ideal For

• Mercedes-Benz C124 / W124 AMG restoration

• Period-correct AMG engine swaps

• Collectors of rare AMG drivetrains

• High-end classic Mercedes performance builds