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

Rare Number-Matching AMG Engine and Transmission Set – Factory 957 AMG Code

This authentic AMG M104 3.4-liter 24-valve inline-six engine paired with its original 722.5 5-speed automatic transmission represents one of the most desirable pre-merger AMG drivetrains ever produced. Built specifically for a 1992 Mercedes-Benz 300CE 3.4 AMG, this complete, number-matching engine and transmission set is correct for collectors and enthusiasts seeking genuine AMG mechanical components with documented history.

The donor vehicle spent time in Germany, Japan, the United Kingdom, and the United States, and the engine and transmission were removed together from the same chassis. Factory documentation confirms matching engine and transmission numbers along with the AMG 957 data code, verifying originality.

Engine Specifications

• Engine Type: AMG-modified M104 inline-6

• Displacement: 3.4 liters

• Valvetrain: DOHC, 24-valve

• Fuel Type: Gasoline

• Factory Output:

  • 268 horsepower

  • 243 lb-ft of torque

• Engine Number: 104980-12-035697

• Mileage: 105,000 km (~65,000 miles)

This engine is complete and features the correct AMG M104 airbox, which is included with the sale.

Transmission Specifications

• Transmission Type: Mercedes-Benz 722.5

• Gears: 5-speed automatic

• Market: European-market specification

• Transmission Number: 722501-03-764057

The 722.5 variant was specifically used in select AMG and European-market models and is confirmed by the datacard as the original transmission paired with this engine.

Included Components

This sale includes the engine and transmission mated together, along with the following components:

• AMG M104 airbox

• Alternator

• Water pump

• Oil pump

• A/C compressor

• Ancillary pumps

• Drive belts

• Exhaust manifolds

• Engine wiring

• Engine mounts

• Transmission mount

Fluids have been drained for storage and transport. Video documentation shows the engine turning over prior to removal.

Condition & Authenticity

• Complete AMG engine and transmission assembly

• Matching numbers verified by factory datacard

• Original AMG 957 data code

• Removed as a complete drivetrain

• No separation between engine and transmission during removal

This drivetrain represents a rare opportunity to acquire a correct AMG 3.4 M104 powertrain, increasingly difficult to source in complete and documented form.

Vehicle Compatibility

Originally built for:

• 1992 Mercedes-Benz 300CE 3.4 AMG (C124)

Commonly used in period AMG conversions and suitable for select W124-based applications with correct supporting components.

Highlights

• Genuine pre-merger AMG engine

• Rare 3.4-liter M104 specification

• Factory-matched 722.5 automatic transmission

• Documented AMG data code

• Complete with AMG airbox and accessories