The turbocharger actuator (OEM 6NW009420 / G-277 / 712120) is an electronic control unit that plays a crucial role in regulating boost pressure on turbocharged diesel engines by precisely controlling the waste-gate or variable geometry vanes in the turbocharger. When functioning correctly, this actuator ensures optimum turbo boost delivery across the engine’s RPM range, resulting in smoother acceleration, improved torque response and better fuel efficiency. A failing actuator can lead to loss of power, inconsistent boost, turbo-related fault codes and limp-home mode, making timely replacement essential for dependable performance and drivability.

OEM Number: 6420901880, 6420902080, 6420903080, 6420904780, 6420904980, 6NW009420, 6NW009420-20, G-277, 6420901080, A6420901080

Product Details:

Number of pins : 5-pin connector

Operating Mode : Electronic

Charge Type : Electrically controlled actuator

Quantity : 1 

Make	Model	Variant	Type	Engine	Chassis	Year
Mercedes-Benz	C-Class	Diesel Estate	C 320 CDI	2987cc 165KW 224HP OM 642.910	RWD -- S203	2005-2007
Mercedes-Benz	C-Class	Diesel Estate	C 350 CDI	2987cc 170KW 231HP OM 642.830	RWD -- S204	2009-2014
Mercedes-Benz	C-Class	Diesel Estate	C 350 CDI 4-matic	2987cc 170KW 231HP OM 642.832	AWD -- S204	2009-2014
Mercedes-Benz	C-Class	Diesel Saloon	C 300 CDI 4-matic	2987cc 170KW 231HP OM 642.832	AWD -- W204	2011-2014
Mercedes-Benz	C-Class	Diesel Saloon	C 320 CDI	2987cc 165KW 224HP OM 642.910	RWD -- W203	2005-2007
Mercedes-Benz	C-Class	Diesel Saloon	C 350 CDI	2987cc 170KW 231HP OM 642.830	RWD -- W204	2009-2014
Mercedes-Benz	C-Class	Diesel Saloon	C 350 CDI 4-matic	2987cc 170KW 231HP OM 642.832	AWD -- W204	2009-2014
Mercedes-Benz	CLK	Diesel Convertible	CLK 320 CDI	2987cc 165KW 224HP OM 642.910	RWD -- A209	2005-2010
Mercedes-Benz	CLK	Diesel Coupe	CLK 320 CDI	2987cc 165KW 224HP OM 642.910	RWD -- C209	2005-2009
Mercedes-Benz	CLS	Diesel Coupe	CLS 320 CDI	2987cc 165KW 224HP OM 642.920	RWD -- C219	2005-2010
Mercedes-Benz	CLS	Diesel Coupe	CLS 350 CDI	2987cc 165KW 224HP OM 642.920	RWD -- C219	2009-2010
Mercedes-Benz	CLS	Diesel Coupe	CLS 350 CDI	2987cc 200KW 272HP OM 642.920	RWD -- C219	2009-2010
Mercedes-Benz	E-Class	Diesel Estate	E 280 T CDI	2987cc 140KW 190HP OM 642.920	RWD -- S211	2005-2009
Mercedes-Benz	E-Class	Diesel Estate	E 280 T CDI 4-matic	2987cc 140KW 190HP OM 642.921	AWD -- S211	2005-2009
Mercedes-Benz	E-Class	Diesel Estate	E 320 T CDI	2987cc 165KW 224HP OM 642.920	RWD -- S211	2005-2009
Mercedes-Benz	E-Class	Diesel Estate	E 320 T CDI 4-matic	2987cc 165KW 224HP OM 642.921	AWD -- S211	2005-2009
Mercedes-Benz	E-Class	Diesel Saloon	E 280 CDI	2987cc 140KW 190HP OM 642.920	RWD -- W211	2005-2008
Mercedes-Benz	E-Class	Diesel Saloon	E 280 CDI 4-matic	2987cc 140KW 190HP OM 642.921	AWD -- W211	2005-2008
Mercedes-Benz	E-Class	Diesel Saloon	E 300 BlueTEC	2987cc 155KW 211HP OM 642.920	RWD -- W211	2007-2008
Mercedes-Benz	E-Class	Diesel Saloon	E 320 CDI	2987cc 165KW 224HP OM 642.920	RWD -- W211	2005-2008
Mercedes-Benz	E-Class	Diesel Saloon	E 320 CDI 4-matic	2987cc 165KW 224HP OM 642.910;OM 642.921	AWD -- W211	2005-2008
Mercedes-Benz	G-Class	Diesel Off-Road Vehicle	G 350 CDI	2987cc 155KW 211HP OM 642.886	AWD -- W463	2011-2015
Mercedes-Benz	GL-Class	Diesel SUV	GL 320 CDI / 350 BlueTEC 4-matic	2987cc 155KW 211HP OM 642.820	AWD -- X164	2009-2012
Mercedes-Benz	GL-Class	Diesel SUV	GL 320 CDI 4-matic	2987cc 165KW 224HP OM 642.940	AWD -- X164	2006-2009
Mercedes-Benz	GL-Class	Diesel SUV	GL 350 CDI 4-matic	2987cc 165KW 224HP OM 642.940	AWD -- X164	2009-2012
Mercedes-Benz	GLK-Class	Diesel SUV	320 CDI 4-matic	2987cc 165KW 224HP OM 642.961	AWD -- X204	2008-2015
Mercedes-Benz	GLK-Class	Diesel SUV	350 CDI 4-matic	2987cc 170KW 231HP OM 642.832	AWD -- X204	2010-2015
Mercedes-Benz	M-Class	Diesel SUV	ML 280 CDI 4-matic	2987cc 140KW 190HP OM 642.940	AWD -- W164	2005-2009
Mercedes-Benz	M-Class	Diesel SUV	ML 300 CDI 4-matic	2987cc 140KW 190HP OM 642.940	AWD -- W164	2009-2011
Mercedes-Benz	M-Class	Diesel SUV	ML 300 CDI 4-matic	2987cc 150KW 204HP OM 642.820	AWD -- W164	2010-2011
Mercedes-Benz	M-Class	Diesel SUV	ML 320 CDI 4-matic	2987cc 165KW 224HP OM 642.940	AWD -- W164	2005-2009
Mercedes-Benz	M-Class	Diesel SUV	ML 350 CDI 4-matic	2987cc 155KW 211HP OM 642.820	AWD -- W164	2009-2011
Mercedes-Benz	M-Class	Diesel SUV	ML 350 CDI 4-matic	2987cc 165KW 224HP OM 642.940	AWD -- W164	2009-2011
Mercedes-Benz	M-Class	Diesel SUV	ML 350 CDI 4-matic	2987cc 170KW 231HP OM 642.820	AWD -- W164	2010-2011
Mercedes-Benz	R-Class	Diesel MPV	R 280 CDI	2987cc 140KW 190HP OM 642.870;OM 642.872;OM 642.950	RWD -- W251,V251	2006-2012
Mercedes-Benz	R-Class	Diesel MPV	R 280 CDI 4-matic	2987cc 140KW 190HP OM 642.950	AWD -- W251,V251	2006-2012
Mercedes-Benz	R-Class	Diesel MPV	R 300 CDI	2987cc 140KW 190HP OM 642.870;OM 642.872;OM 642.950	RWD -- W251,V251	2009-2012
Mercedes-Benz	R-Class	Diesel MPV	R 300 CDI 4-matic	2987cc 140KW 190HP OM 642.950	AWD -- W251,V251	2009-2012
Mercedes-Benz	R-Class	Diesel MPV	R 320 CDI 4-matic	2987cc 155KW 211HP OM 642.870;OM 642.950	AWD -- W251,V251	2006-2012
Mercedes-Benz	R-Class	Diesel MPV	R 320 CDI 4-matic	2987cc 165KW 224HP OM 642.950	AWD -- W251,V251	2006-2010
Mercedes-Benz	R-Class	Diesel MPV	R 350 CDI 4-matic	2987cc 155KW 211HP OM 642.870;OM 642.950	AWD -- W251,V251	2006-2014
Mercedes-Benz	R-Class	Diesel MPV	R 350 CDI 4-matic	2987cc 165KW 224HP OM 642.950	AWD -- W251,V251	2009-2012
Mercedes-Benz	S-Class	Diesel Saloon	S 320 CDI	2987cc 155KW 211HP OM 642.930	RWD -- W221	2005-2013
Mercedes-Benz	S-Class	Diesel Saloon	S 320 CDI	2987cc 173KW 235HP OM 642.930	RWD -- W221	2005-2009
Mercedes-Benz	S-Class	Diesel Saloon	S 320 CDI 4-matic	2987cc 155KW 211HP OM 642.932	AWD -- W221	2005-2013
Mercedes-Benz	S-Class	Diesel Saloon	S 320 CDI 4-matic	2987cc 173KW 235HP OM 642.932	AWD -- W221	2006-2013
Mercedes-Benz	S-Class	Diesel Saloon	S 350 CDI	2987cc 173KW 235HP OM 642.930	RWD -- W221	2009-2013
Mercedes-Benz	Sprinter 3-T	Diesel Bus	215 CDI	2148cc 110KW 150HP OM 646.986;OM 646.989;OM 646.990	RWD -- B906	2006-2009
Mercedes-Benz	Sprinter 3-T	Diesel Chassis Cab	218 CDI	2987cc 135KW 184HP OM 642.896;OM 642.992;OM 642.993	RWD -- B906	2006-2009
Mercedes-Benz	Sprinter 3-T	Diesel Chassis Cab	219 CDI / BlueTEC	2987cc 140KW 190HP OM 642.896;OM 642.992	RWD -- B906	2009-2018
Mercedes-Benz	Sprinter 3-T	Diesel Van	219 CDI / BlueTEC	2987cc 140KW 190HP OM 642.896;OM 642.992	RWD -- B906	2009-2018
Mercedes-Benz	Sprinter 3.5-T	Diesel Bus	318 CDI 4x4	2987cc 135KW 184HP OM 642.896;OM 642.986;OM 642.992;OM 642.993	AWD -- B906	2008-2009
Mercedes-Benz	Sprinter 3.5-T	Diesel Chassis Cab	318 CDI (906.131, 906.133, 906.135, 906.231, 906.233,...	2987cc 135KW 184HP OM 642.896;OM 642.992;OM 642.993	RWD -- B906	2006-2009
Mercedes-Benz	Sprinter 3.5-T	Diesel Chassis Cab	318 CDI 4x4 (906.131, 906.133, 906.135, 906.231, 906.233...	2987cc 135KW 184HP OM 642.896;OM 642.992;OM 642.993	AWD -- B906	2008-2009
Mercedes-Benz	Sprinter 3.5-T	Diesel Chassis Cab	319 CDI / BlueTEC (906.131, 906.133, 906.135, 906.231,...	2987cc 140KW 190HP OM 642.896;OM 642.898;OM 642.992	RWD -- B906	2009-2018
Mercedes-Benz	Sprinter 3.5-T	Diesel Van	318 CDI	2987cc 135KW 184HP OM 642.896;OM 642.986;OM 642.992;OM 642.993	RWD -- B906	2006-2009
Mercedes-Benz	Sprinter 3.5-T	Diesel Van	319 CDI / BlueTEC	2987cc 140KW 190HP OM 642.896;OM 642.898;OM 642.986;OM 642.992	RWD -- B906	2009-2018
Mercedes-Benz	Sprinter 3.5-T	Petrol Bus	316	1796cc 115KW 156HP M 271.951	RWD -- B906	2008-2018
Mercedes-Benz	Sprinter 3.5-T	Petrol Chassis Cab	316	1796cc 115KW 156HP M 271.951	RWD -- B906	2008-2018
Mercedes-Benz	Sprinter 3.5-T	Petrol Van	316	1796cc 115KW 156HP M 271.951	RWD -- B906	2008-2018
Mercedes-Benz	Sprinter 4.6-T	Diesel Chassis Cab	419 CDI	2987cc 140KW 190HP OM 642.896;OM 642.898;OM 642.986;OM 642.992	RWD -- B906	2009-2018
Mercedes-Benz	Sprinter 4.6-T	Diesel Van	419 CDI	2987cc 140KW 190HP OM 642.896;OM 642.992	RWD -- B906	2009-2018
Mercedes-Benz	Sprinter 5-T	Diesel Chassis Cab	518 CDI	2987cc 135KW 184HP OM 642.896;OM 642.986;OM 642.992;OM 642.993	RWD -- B906	2006-2009
Mercedes-Benz	Sprinter 5-T	Diesel Chassis Cab	519 CDI / BlueTEC	2987cc 140KW 190HP OM 642.896;OM 642.898;OM 642.986;OM 642.992	RWD -- B906	2009-2018
Mercedes-Benz	Sprinter 5-T	Diesel Van	518 CDI	2987cc 135KW 184HP OM 642.896;OM 642.986;OM 642.992;OM 642.993	RWD -- B906	2006-2009
Mercedes-Benz	Sprinter 5-T	Diesel Van	519 CDI / BlueTEC	2987cc 140KW 190HP OM 642.896;OM 642.898;OM 642.986;OM 642.992	RWD -- B906	2009-2018
Mercedes-Benz	Viano	Diesel Bus	CDI 3.0	2987cc 150KW 204HP OM 642.990	RWD -- W639	2006-2024
Mercedes-Benz	Viano	Diesel Bus	CDI 3.0	2987cc 165KW 224HP OM 642.890	RWD -- W639	2010-2024
Mercedes-Benz	Vito	Diesel Bus	120 CDI	2987cc 150KW 204HP OM 642.990	RWD -- W639	2006-2024
Mercedes-Benz	Vito / Mixto	Diesel Van	120 CDI	2987cc 150KW 204HP OM 642.990	RWD -- W639	2006-2024
Make	Model	Variant	Type	Engine	Chassis	Year

Our SKU: TMG-2776NW009420_94

All our Turbocharger Actuator are OEM quality and reliable after market car parts. This Turbocharger Actuator is specifically compatible with Mercedes-Benz: C-Class, CLK, CLS, E-Class, G-Class, GL-Class, GLK-Class, M-Class, R-Class, S-Class, Sprinter 3-T, Sprinter 3.5-T, Sprinter 4.6-T, Sprinter 5-T, Viano, Vito, Vito / Mixto, .

Please use our make-model-year tool to check this part's compatibility with your vehicle. However, please note that our tool is for reference only and we recommend that you check the part number on your old unit prior to purchasing.

If you are still not sure about the compatibility of this part to your vehicle, please supply us with the VIN number or Reg number in our live chat or contact form! You can also find details on our purchasing & shipping guide here.

Key Benefits

Accurate Turbo Boost Control
The actuator electronically adjusts the turbo waste-gate or variable vanes to maintain correct boost pressure as commanded by the engine control unit (ECU), supporting efficient combustion and engine responsiveness.

Restores Engine Power & Response
By ensuring the turbocharger operates at its designed boost levels, this actuator helps restore strong acceleration, smooth throttle response and improved mid-range performance.

OEM Reference Compatibility (6NW009420 / G-277)
Designed to match original equipment turbo actuator part numbers such as 6NW009420, G-277 and 712120, enabling a direct replacement on vehicles that originally used this specification.

Reduces Faults & Limp Mode Issues
Replacing a worn or erratic actuator can clear boost control faults and reduce occurrences of limp-home mode triggered by turbocharger malfunction codes.

Broad Vehicle Application
Commonly used on Mercedes-Benz turbocharged diesel models equipped with OM642/OM646/OM611 engines, including E-Class, C-Class, ML, GL, R-Class, Viano, Vito and Sprinter applications — as well as some Jeep and Dodge vehicles that share the OM642 turbo system architecture.

Frequently Asked Questions (FAQs)

Q: What does a turbocharger actuator do?
A turbocharger actuator electronically controls the position of the internal waste-gate or variable geometry vanes; by doing so, it regulates turbo boost pressure to match engine demands and maintain optimal performance.

Q: What are symptoms of a failing turbo actuator?
Common signs include reduced engine power, delayed or weak acceleration, black smoke on acceleration, turbo fault codes (e.g., boost pressure faults), and the vehicle entering limp-home mode.

Q: Which vehicles commonly use part number 6NW009420?
This actuator is found on many Mercedes-Benz diesel turbo systems such as the E-Class, C-Class, GL, ML, R-Class, Viano, Vito and Sprinter with the OM642 engine family; it’s also compatible with some Jeep, Dodge and Chrysler models that share similar turbo components. Always confirm fitment using your OEM number before ordering.

Q: Is this a direct replacement unit?
Yes — when matched to the correct original part codes (e.g., 6NW009420, G-277, 712120), this actuator installs as a direct replacement without major modification.

Q: Does the actuator require calibration or programming?
In most cases, replacing the actuator is a plug-in replacement, but on some vehicles a diagnostic reset or ECU relearn may be needed to clear fault codes and regenerate correct boost control mapping.