Mercedes-Benz CLS450 Reduced Power light is on Inspection at your home or office.

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Reduced Power light is on Inspection Service

How much does a Reduced Power light is on Inspection cost?

On average, the cost for a Mercedes-Benz CLS450 Reduced Power light is on Inspection is $95 with $0 for parts and $95 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
2019 Mercedes-Benz CLS450L6-3.0L Turbo HybridService typeReduced Power light is on InspectionEstimate$114.99Shop/Dealer Price$124.99 - $132.49
2020 Mercedes-Benz CLS450L6-3.0L Turbo HybridService typeReduced Power light is on InspectionEstimate$94.99Shop/Dealer Price$105.01 - $112.52
2021 Mercedes-Benz CLS450L6-3.0L Turbo HybridService typeReduced Power light is on InspectionEstimate$94.99Shop/Dealer Price$105.01 - $112.52
2022 Mercedes-Benz CLS450L6-3.0L Turbo HybridService typeReduced Power light is on InspectionEstimate$94.99Shop/Dealer Price$104.99 - $112.48
Show example Mercedes-Benz CLS450 Reduced Power light is on Inspection prices

A Reduced Power light usually indicates a fairly serious problem with the throttle system. When this light illuminates the vehicle will often go into a “safe mode”, which will severely limit the speed of the car and in some cases will render the vehicle un-drivable.

Since the Reduced Power light can trigger for a number of different reasons, tracking down the exact cause is extremely important, if the vehicle is not properly diagnosed and repaired, the Reduced Power light will trigger again, putting the vehicle in safe mode.

How this system works:

When the vehicle’s computer detects a fault in the engine that affects its drivability, performance, transmission or emission system it will trigger the reduced power light. It will also trigger if there is an issue with the electronic throttle, the accelerator pedal or the throttle module.

When a vehicle goes into reduced power mode it will seriously impact its performance. Some vehicle will be restricted to idle speed while others restrict speed to 20-30 miles per hour. The Reduced Power trigger will save Diagnostic Trouble Codes (DTCs), which will indicate where the fault occurred. In most cases, a Restricted Power light is related to a throttle body or the connector.

Common reasons for this to happen:

  • Faulty Throttle Body: A throttle body is part of the of the air intake system which helps control the amount of air going into the engine. If a throttle body is failing the engine will not get the correct mixture of air and fuel. This can trigger the Reduced Power light as well as lead to a poor running engine. It can also trigger the Check Engine light.

  • Failing Throttle Position Sensor: The throttle position sensor tells the vehicle computer the position of the gas pedal. The computer uses this information to calculate the proper amount of air and fuel to send to the engine. The throttle position sensor also controls shifting the gears of a vehicle, which means that a faulty throttle position sensor will prevent a car from changing gears. If this part is failing, the Reduced Power light will trigger.

  • Faulty Engine Control Unit: The engine control unit is an essential component of a vehicles computer. It regulates and controls many systems, including the drive train and parts of the engine. If a fault is detected in this crucial part, it can trigger the Reduced Power light as well as the Check Engine light. This is a major issue that should be investigated as soon as possible.

  • Faulty Wiring: Exposed or damaged wires can cause issues with the any of these components and will possibly trigger the Reduced Power light. A loose wiring crimp can also be the culprit. Wiring issues can be tricky to track down so using a professional mechanic is a necessity.

  • Malfunctioning Oxygen Sensors: Oxygen sensors are responsible for measuring how rich or lean exhaust gases are leaving a vehicles combustion chamber. The vehicle’s computer uses this information to constantly adjust the amount of fuel going into the engine. A failing or dirty sensor can put too much or too little fuel into the engine. While a failing oxygen sensor will usually trigger a Check Engine light it is possible that the Reduced Power light could also trigger.

What to expect:

A top-rated mobile mechanic will come to your home or office to determine the source and cause of the Reduced Power light issue, ​and will then provide a detailed inspection report that includes the scope and cost of the necessary repairs.

How it's done:

The mechanic will inspect your vehicle's air intake system, electrical wiring and sensors, including the throttle body and oxygen sensors, along with other important components. It may be necessary for the mechanic to test drive the car to verify the complaint and provide an accurate diagnosis.

How important is this service?

The Reduced Power light only illuminates if there is a serious issue with the vehicle that must be addressed immediately. In almost all cases, the throttle or the vehicles computer will be malfunctioning which can make driving the vehicle dangerous. While it varies by manufacturer, most vehicles that go into “safe mode” will stay there until the error codes are read by a code scanner.

If the vehicle Reduced Power light illuminates the vehicle should immediately be inspected, diagnosed and repaired.

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William

33 years of experience
69 reviews
William
33 years of experience
Mercedes-Benz E350 V6-3.5L - Reduced Power light is on - Sun City, California
Excellent customer service. Patient as well. Highly recommended.

Michael

11 years of experience
98 reviews
Michael
11 years of experience
Mercedes-Benz E320 V6-3.2L - Oil Change - Basking Ridge, New Jersey
On time, courteous and professional. Highly recommend!

Chris

22 years of experience
2258 reviews
Chris
22 years of experience
Mercedes-Benz S550 V8-5.5L - Strut Assembly Replacement (Front) - Laguna Niguel, California
Went out of his way to complete the job and satisfy me as the customer.

Scott

36 years of experience
916 reviews
Scott
36 years of experience
Mercedes-Benz SL500 V8-5.0L - Power Steering Pump - San Tan Valley, Arizona
Scott was very professional, and arrived on time. Did an excellent job on my 2003 Mercedes SL500R installing the tandem pump for the ABC/Power Steering. He saved me over $4000 compared to the cheapest Mercedes Dealership would have charged. He will be my mechanic from now on. Thanks you Scott.

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