Turbo Actuator - Mercedes Benz - M642 Engine 350 Bluetec
R 2,999.00
Details
Turbo Actuator - Mercedes Benz - M642 Engine BlutecV6 Diesel (New)
Mercedes Benz - W204 07-14, E-Class W212 09-16, S-Class W221 05-13, ML W164 05-12, GL X164 03-12, ML W166 12-15, GL X166 12-15, R-Class W651 05-17, Vito/Viano W639 03-14
Part No: A6420901186 A6420901686 A6420902386
Brand: Revarotech
What's in the Box: 1x Turbo Actuator only.
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Mercedes-Benz M642 Turbo Actuator
The turbo actuator on the Mercedes-Benz M642 3.0 V6 diesel controls the turbocharger's variable vanes, adjusting boost delivery as engine load changes. When the actuator fails, it commonly shows up as a loss of power, black or grey exhaust smoke, a whistling or whining turbo noise, or a limp mode warning on the dash, symptoms that are often mistaken for a failing turbocharger itself rather than the actuator that controls it.
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Whether you're chasing a persistent limp mode or diagnosing unexpected boost issues on the 350 Bluetec, M&B Parts offers a direct-fit turbo actuator engineered for factory-matched fitment across the M642 range.
Precision-Engineered to Restore Accurate Boost Control
A turbo actuator has to respond precisely to changing engine load, so dimensional accuracy and calibration compatibility matter as much as the part itself. Our replacement actuator is engineered to the original specification, restoring accurate variable-vane control without the guesswork of a mismatched aftermarket part.
- Factory-Matched Calibration Interface: compatible with standard diagnostic recalibration procedures after fitting.
- Precision Actuation: engineered to the M642's original response tolerances for consistent boost delivery.
- Complete Unit: supplied as one complete actuator, ready to fit.
Compatible Models & Fitment
This actuator is engineered specifically for the M642 3.0 V6 diesel (350 Bluetec) as fitted to:
- C-Class W204 (2007-2014)
- E-Class W212 (2009-2016)
- S-Class W221 (2005-2013)
- ML W164 (2005-2012) and W166 (2012-2015)
- GL X164 (2003-2012) and X166 (2012-2015)
- R-Class W251 (2005-2017)
- Vito/Viano W639 (2003-2014)
Cross-references OE part numbers A6420901186, A6420901686 and A6420902386. Confirm your engine code before ordering, as boost-system symptoms can overlap with other faults, a diagnostic scan first is worthwhile.
Why Buy Your Mercedes-Benz Turbo Actuator from M&B Parts
- OEM-Grade Durability: precision-engineered to factory tolerances for consistent, accurate boost control.
- Complete Turbo Solutions: explore our full range of turbo actuators across the Mercedes-Benz diesel range.
- Workshop Support: our Edenvale team can fit and recalibrate the actuator in the same visit.
- Fast South African Delivery: prompt dispatch with tracked courier delivery nationwide, straight to your door or workshop.
Frequently Asked Questions
What are the signs of a failing turbo actuator on the M642 diesel?
A noticeable loss of power, black or grey exhaust smoke, a whistling or whining noise from the turbo, or a limp mode with an engine management light are the most common signs. These symptoms can overlap with other boost-system faults, so a diagnostic scan before ordering is worthwhile.
Which models does this actuator fit?
The M642 3.0 V6 diesel (350 Bluetec) as used in C-Class W204, E-Class W212, S-Class W221, ML W164/W166, GL X164/X166, R-Class W251 and Vito/Viano W639. Confirm your engine code before ordering.
Does the actuator need to be recalibrated after fitting?
Most replacement actuators need a basic setting or calibration procedure carried out with diagnostic equipment after fitting. Our Edenvale workshop can fit and recalibrate it in the same visit.
Is this a genuine Mercedes-Benz part?
No. This is an aftermarket replacement turbo actuator, cross-referenced to OE part numbers A6420901186, A6420901686 and A6420902386, not a genuine Mercedes-Benz part.
