19 Mar, 16

Mercedes C-Class Electronic Turbo Actuator Repairs

Mercedes Turbo Actuator RepairsMercedes C-Class Electronic Turbo Actuator Problems
The modern Mercedes C-Class from 2000 onwards is usually fitted with an electronic turbo actuator. The electronic actuator / wastegate is controlled by the engine’s ECU and is used to efficiently regulate the flow of the turbocharger and deliver precise amounts of turbo boost pressure. The ECU can be tuned to increase the power output from the turbocharger and simultaneously increase the economy of the vehicle.

Failure of the electronic turbo actuator is very common and can cause many problems on the vehicle. The most common cause of an electronic turbo failure is the variable vanes in the turbo get stuck due to carbon build up and when the electronic actuator tries to open or close the vanes the actuator gets damaged. Below we have compiled a short list of part numbers associated with electronic turbo actuators found fitted to the Mercedes C-Class:

Common Part NumbersCommon Part Numbers
H-00 TP6NW009483
25086 L26NW009420

Common Electronic Turbo Actuator Fault Symptoms
Some problems related to a failed electronic actuator include:

  • Loss of power under acceleration
  • Intermittent loss of power under acceleration
  • Smoking on acceleration
  • Fault codes pointing to turbo actuator
  • Fault Code: 0046 – Control Circuit Performance
  • Actuator arm not moving
  • Engine light on
  • Limp mode

If your local dealer has diagnosed your vehicle with a faulty turbo actuator then you will be expecting a very high bill of at least £1200 to replace the turbocharger and actuator for a new unit. The actuator is not a part which can be purchased separately and, therefore, the only option is the replace both the turbo and actuator together. The alternative option would be to have your electronic actuator remanufactured by a specialist like Sinspeed and if needed, we can also rebuild turbochargers.

Mercedes Turbo Actuator FaultsMercedes C-Class Electronic Turbo Actuator Repairs – By Sinspeed
We’re able to fully test and rebuild most electronic turbo actuators and always use new genuine OEM components when rebuilding the electronic actuator to ensure all repaired units meet & exceed OE specifications. We carry some of the most common failing part numbers in stock and can be supplied on an exchange basis. All of our remanufactured turbo actuators come fully plug & play meaning no programming is required when refitting to the vehicle and are all backed by our Lifetime warranty.

Below is a list of vehicles we know that are fitted with this type of electronic turbo actuator. It is not a complete list so don’t worry if your unit is not listed in the table below, you can call us to confirm.

MercedesC30 AMG3.0CDiDiesel
MercedesC2001.8CDi BlueDiesel
MercedesC2002.2CDi BlueDiesel
MercedesC2202.2CDi BlueDiesel
MercedesC2202.2CDi BlueDiesel
MercedesC2502.2CDi BlueDiesel
MercedesC3003.0CDi BlueDiesel
MercedesC3503.0CDi BlueDiesel

We can also remanufacture the turbocharger if required – all remanufactured turbochargers are returned with a 2-year warranty and again we use only new genuine OEM components when rebuilding to ensure each and every rebuilt turbocharger meets & exceeds OE specifications.

Professional diagnosis & fitting services available.

Tags : 25086L2, 6NW 008 412, 6NW 009 228, 6NW 009 420, 6NW 009 483, 6NW 009 660, H-00 TP, H20, H29HT, H48.
6 thoughts on “Mercedes C-Class Electronic Turbo Actuator Repairs
  • I have a Mercedes e350 coupe, i was on the motorway today and it lost power and went into limp mode. i had a local mechanic have a look at it and he suspected it was an issue with the turbo. he advised me that it would be worth speaking to someone who can repair rather than change it as they are expensive.

    • Hi Samet

      Thanks for the enquiry,

      I have sent you an email for the testing and repair of your turbocharger and actuator unit. I have also included costs for our removal and fitting services as well if required.

      Kind Regards


  • I need a boost actuator for a 55 plate mercedes c320 sport edition estate 55 plate reg VK55*** can you help me please .

    • Hi Danny

      Thanks for the enquiry,

      We’ve sent you an email with full information and pricing.

      Kind Regards


  • I am going into limp mode in my C320 cdi 2006 model. Suspect its also the actuary. Im in south africa… Can you help ?

    • Hi George

      Thanks for the enquiry,

      We have sent you an email with full information and pricing.

      Kind Regards


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