Description
This listing is for a reconditioned Garrett GT18V turbocharger, specifically designed for the Mercedes E-Class 220 CDI with the OM646 engine, manufactured between 2002 and 2008. This unit is a direct replacement for the original equipment and has undergone a comprehensive reconditioning process by Gap Turbos, ensuring reliability and performance.
The GT18V is a variable nozzle turbine (VNT) turbocharger, meaning it utilises adjustable vanes to optimise exhaust gas flow across the turbine wheel. This design enhances low-end torque and improves fuel efficiency, but it is also susceptible to specific failure modes. Common issues with this particular turbocharger include seizure of the VNT mechanism due to carbon build-up from exhaust soot, electronic actuator faults leading to incorrect vane positioning, and premature wear of the compressor housing assembly (CHRA) bearings, often caused by oil starvation or contamination. Symptoms of these failures typically include a noticeable loss of power, the vehicle entering ‘limp mode’, excessive exhaust smoke, or unusual whining/grinding noises from the turbo area.
At Gap Turbos, we address these common failures by stripping each unit down, thoroughly cleaning all components, and replacing all worn parts with new, high-quality equivalents. This includes new bearings, seals, and a re-calibrated VNT mechanism and electronic actuator, where applicable. Each reconditioned turbocharger is balanced to OEM specifications and rigorously tested to ensure it meets our stringent performance and durability standards. We can supply this unit as a reconditioned exchange, or we offer a full fitting service at our Birmingham workshop, which includes a comprehensive engine system clean to prevent recurrence of the original fault.
What this turbocharger fits
- Turbo frame: GT18V
- Vehicle: Mercedes E-Class 220 CDI
- Engine code(s): OM646
- HP: 150
- Year range: 2002-2008
- Fuel: Diesel
- Brand: Mercedes
- Part number (OE): 727461-5006s
- Alternative part number(s): A6460900080
- Condition: Reconditioned
For a competitive quote on this reconditioned turbocharger or our fitting service, please contact us directly. All reconditioned units come with a 12-month warranty for your peace of mind.
Specifications
| Frame | GT18V |
|---|---|
| Engine code(s) | OM646 |
| Horsepower | 150hp |
| Year range | 2002-2008 |
| Fuel | Diesel |
| OE number | 727461-5006s |
| Alternative number(s) | A6460900080 |
| Condition | Reconditioned |
Vehicle fitment
- Mercedes E-Class 220 CDI
Common faults & troubleshooting
[“Loss of power or ‘limp mode’: Often indicates a seized VNT mechanism or a faulty electronic actuator, preventing proper boost control.”, ‘Excessive blue/white smoke from exhaust: Suggests oil burning, likely due to worn CHRA bearings or seals within the turbocharger.’, ‘Whining or grinding noise: A distinct metallic whine or grind points to contact between the compressor/turbine wheels and their housings, indicating severe bearing wear or foreign object damage.’, ‘Boost leaks (hissing sound): Check all boost pipes and intercooler for cracks or loose connections, as this can mimic turbocharger failure by reducing effective boost pressure.’, ‘Oil leaks around the turbocharger: Inspect oil feed and drain lines for blockages or loose connections, as well as the turbo seals themselves for failure.’]
Fitting notes for this unit
[‘Always replace the oil feed pipe and both oil drain pipe gaskets to prevent future oil starvation or leaks, as these are critical to turbo longevity.’, “Ensure the engine’s oil system is thoroughly flushed and a new oil filter is fitted before installing the new/reconditioned turbocharger to remove any contaminants.”, ‘Prime the new turbocharger with clean engine oil through the oil inlet hole before fitting the oil feed pipe to ensure immediate lubrication on first start-up.’, “Torque all exhaust manifold and turbocharger mounting bolts to the manufacturer’s specified settings to prevent exhaust leaks or stress on the turbo housing.”, ‘After installation, run the engine at idle for several minutes before revving to allow oil pressure to stabilise and ensure full lubrication to the turbocharger.’, ‘Inspect the intercooler and associated pipework for any debris or oil residue from the failed unit; clean or replace as necessary to prevent damage to the new turbo.’]
Alternative part numbers
This turbo is also referenced by:
A6460900080— Mercedes Turbocharger OEM A6460900080 (Mercedes E-Class 220 CDI, OM646, 150hp)
Need this turbo cleaned or reconditioned?
Many turbo faults are actuator-only or VNT vane carbon buildup, not a failed core. We strip, ultrasonically clean, rebuild, and balance to OEM tolerances with a 24-month parts and labour warranty.
Turbo Reconditioning →Need to speak to a turbocharger expert?
Send your reg, a photo of the existing part, and a brief description of the fault. We will respond same day.
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