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Mercedes-Benz 350SDL Coolant Temperature Switch (Sensor) Replacement at your home or office.

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Coolant Temperature Switch (Sensor) Replacement Service

How much does a Coolant Temperature Switch (Sensor) Replacement cost?

On average, the cost for a Mercedes-Benz 350SDL Coolant Temperature Switch (Sensor) Replacement is $130 with $35 for parts and $95 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
1991 Mercedes-Benz 350SDLL6-3.4L Turbo DieselService typeCoolant Temperature Switch (Sensor) ReplacementEstimate$185.75Shop/Dealer Price$220.94 - $287.14
1990 Mercedes-Benz 350SDLL6-3.4L Turbo DieselService typeCoolant Temperature Switch (Sensor) ReplacementEstimate$165.75Shop/Dealer Price$200.97 - $267.19
Show example Mercedes-Benz 350SDL Coolant Temperature Switch (Sensor) Replacement prices

What is the Coolant Temperature Switch (Sensor) all about?

The coolant temperature switch, also called the coolant temperature sensor, is a switch that reads the engine coolant temperature and sends a signal to the engine control module, or ECM, to control other functions of engine operation such as the air-fuel ratio.

It is also called a switch because on some cars, it is used to turn on the engine cooling fan at a specific temperature. This aids in the engine warm-up process as well as keeping the engine at a safe operating temperature.

Keep in mind:

  • The coolant temperature switch is a crucial part of the cooling system. If faulty, it can cause severe internal engine damage due to overheating, incorrect air-fuel ratio, or incorrect ignition timing. It can also cause shorter life to the cooling fan motor or other electrical components of the cooling system.
  • Some vehicles are equipped with a separate sensor to display the engine temperature to the driver via the temperature gauge.

How it's done:

  • The Coolant Temperature Switch is verified that it needs to be replaced. The coolant is drained until the switch is exposed.

  • The defective Coolant Temperature Switch is removed by disconnecting the connector and removing it from the manifold.

  • The new Coolant Temperature Switch is installed into the mounting hole in the manifold and the electrical connector is reconnected. The coolant is then refilled.

  • The Coolant Temperature Switch is tested for operation, codes cleared, and retested to ensure all codes have been resolved.

  • The vehicle is road tested to ensure proper operation of the Cooling System.

Our recommendation:

If you suspect that your coolant temperature switch has failed, have one of our licensed mechanics come out immediately to diagnose the problem.

What common symptoms indicate you may need to replace the Coolant Temperature Switch (Sensor)?

  • Check Engine light on
  • Engine overheating
  • Cooling fan runs intermittently
  • Engine misfires, stalls, or idles roughly
  • Erratic coolant temperature

How important is this service?

This part, when faulty, could cause the fan to run intermittently or not at all, which in turns causes overheating or overuse of the cooling fan motor. Whenever overheating occurs, severe engine damage is a possibility.

The engine air-fuel ratio is what keeps it running smoothly. If the ratio gets skewed, the engine will have poor fuel economy and run poorly or not at all. The coolant temperature switch is important because it gives the ECM the information it needs to make this calculation and run the engine optimally. YourMechanic will be able to tell you if this part is performing correctly.

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Number of Mercedes-Benz Coolant Temperature Switch (Sensor) Replacement services completed
55+
services done by our mechanics
TOTAL NUMBER OF EXPERT Mercedes-Benz MECHANICS
1100+
experts on our platform
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Meet some of our expert Mercedes-Benz mechanics

Real customer reviews from Mercedes-Benz owners like you.

Excellent Rating

(5)
Rating Summary
5
0
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5
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Brian

23 years of experience
696 reviews
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Brian
23 years of experience
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by henry
Mercedes-Benz C250 L4-1.8L Turbo - Coolant Temperature Switch (Sensor) Replacement - Jacksonville, Florida
Brian was very professional, courteous and quick. I will be referring him to all my friends and family

Harold

32 years of experience
52 reviews
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Harold
32 years of experience
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by Goldwasser
Mercedes-Benz E350 V6-3.5L - Coolant Temperature Switch (Sensor) - Jacksonville, Florida
Very friendly and knowledgeable. Great attention to detail. Highly recommend.

Charles

11 years of experience
69 reviews
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Charles
11 years of experience
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by Brandon
Mercedes-Benz CLK350 V6-3.5L - Coolant Temperature Switch (Sensor) - Fort Lauderdale, Florida
Nice and friendly and on time

Michael

21 years of experience
280 reviews
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Michael
21 years of experience
Request Michael
by Jacob
Mercedes-Benz CLK320 V6-3.2L - Coolant Temperature Switch (Sensor) - Rancho Cucamonga, California
Michael deserves a full 5 stars for his honesty and work. I had rated him earlier at 4 stars because he broke the temperature sensor but admitted it right away and said he would return with the part and fix it at no charge, I admired his awesome honesty but was not sure if he would follow through and hence the 4 stars rating earlier. But he followed through and it was all completed and so he deserves the full 5 stars for his knowledge, experience and above all his integrity and honesty which is not common with the mechanics these days, So he needs to be recognized for that. I might give him a 4.95 stars which is not possible because he forgot to put back the tensioner pulley dust cap and could not find it later. Its a minor part and cant be bought at the store either which is annoying but I would still give him 5 stars because of his honesty, efficiency and knowledge. He was quick and efficient. Keep up the good work Michael.

Excellent Rating

(5)
Rating Summary
5
0
0
0
0
5
0
0
0
0
Number of Mercedes-Benz Coolant Temperature Switch (Sensor) Replacement services completed
55+
services done by our mechanics
TOTAL NUMBER OF EXPERT Mercedes-Benz MECHANICS
1100+
experts on our platform
Yourmechanic was featured in

New York Times NBC CBS Forbes INC Tech Crunch

Learn more about us

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