21 Mar, 16

Mercedes CLK Electronic Turbo Actuator Repairs

Mercedes Turbo Actuator RepairsMercedes CLK Electronic Turbo Actuator Problems
The Mercedes CLK from 2002 to 2009 is fitted with an electronic turbo actuator. They are extremely common failing parts and when they do fail, they can become a very costly part to replace. The electronic turbo actuator is controlled by the engine ECU and is designed to regulate the boost pressure from the turbocharger.

Some of the most common problems relating to a failed turbo actuator can include a loss of power and engine warning lights appearing on the dash. See the most common symptoms listed below:

  • 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

There are a few variations of the actuator fitted to this vehicle, all of which we can test and repair but below are some of the most common part numbers we’ve seen:

Common Part NumbersCommon Part Numbers
H-4825086 L2

Mercedes Turbo Actuator FaultsIf your electronic turbo actuator has failed then your local dealer will be quoting on a very expensive replacement turbocharger + actuator together because the actuator is not a part that can be purchased separately. For this reason, you can expect a repair bill upwards of £1500 for the replacement part. The alternative solution would be to have your actuator repaired by us.

Mercedes CLK Turbo Actuator Repairs – By Sinspeed
We have the facility to fully test and rebuild the electronic turbo actuator fitted to a Mercedes CLK. We use new genuine OEM components when repairing the turbo actuator to ensure each and every rebuilt actuator unit meets & exceeds OE specifications. All rebuilt actuator units are returned with a Lifetime warranty and will not require programming when refitting to the vehicle.

Below you can see a shortlist we’ve compiled of common Mercedes CLK’s fitted with the commonly failing electronic turbo actuator. If your model is not listed below, contact us to confirm whether a repair is possible.


Tags : 25086L2, 6NW 008 412, H48, Mercedes CLK Turbo Actuator Faults, Mercedes CLK Turbo Actuator Problems, Mercedes CLK Turbo Electronic Turbo Wastegate Repairs.
6 thoughts on “Mercedes CLK Electronic Turbo Actuator Repairs
  • I have a CLK220 on 08 plate which seem to have lost a bit of power, especially when driving in mountains – it proves very difficult. Engine Fault light is on. Can you help ?

    • Hi Ziggy

      Thanks for the enquiry,

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

      Kind Regards


  • Hi.
    I have a problem with my turbo actuator on my 09 clk 320cdi sport. I have narrowed it down to the electronic components in the cap itself. Power goes to the actuator. The worm gear etc all look fine. Waste gate moves freely. Could you advise on a possible repair and cost.
    Many thanks.

    • Hi Trevor

      Thanks for the enquiry,

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

      Kind Regards


  • 2008, stumbles under hard Acceleration,
    goes into lockdown over 3000 RPM, have to stop and re-start engine to clear problem.
    was told by mercedes needed new turbo and actuator,
    turbo looks good, vanes move ok

    • Hello Cooper!
      Thanks for contacting us.
      I have forwarded your enquiry to our relevant department & they’ll be reaching out to you soon via email.


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