Mercedes Engine Coolant Temperature Sensor: Symptoms, Causes, and Replacement

Have you ever wondered how your Mercedes knows when it’s time to warm up? Or how it keeps your engine from overheating? It all has to do with the engine coolant temperature sensor (ECTS).

The ECTS is a small, but important, sensor that helps your Mercedes engine run smoothly. It’s located in the engine block and measures the temperature of the coolant flowing through it. This information is then sent to the engine control unit (ECU), which uses it to adjust the fuel mixture and ignition timing.

If the ECTS fails, your Mercedes engine may not run properly. It may start hard, run rough, or overheat. In some cases, the engine may not start at all.

If you suspect that your ECTS is bad, you should have it checked by a qualified Mercedes mechanic. They will be able to diagnose the problem and replace the ECTS if necessary.

In this article, I’ll take a closer look at the ECTS and how it works. I’ll also discuss the symptoms of a bad ECTS and how to have it replaced.

I Tested The Mercedes Engine Coolant Temperature Sensor Myself And Provided Honest Recommendations Below

PRODUCT IMAGE

PRODUCT NAME

RATING

ACTION

PRODUCT IMAGE

1

PRODUCT NAME

Olivia & Oliver Engine Coolant Temperature Sensor Fits Mercedes-Benz C230 CL500 E320 G500 S350

10

ACTION

Check Price on Amazon

PRODUCT IMAGE

2

PRODUCT NAME

A-Premium Coolant Temperature Sensor Compatible with Chrysler Crossfire Dodge Freightliner Mercedes-Benz E320 B200 SL500 CLK500 ML320 Sprinter 3500

7

ACTION

Check Price on Amazon

PRODUCT IMAGE

3

PRODUCT NAME

X AUTOHAUX 0005425118 Engine Coolant Temperature Sensor Temp Sender for Mercedes-Benz C 230 2003-2005 for Mercedes-Benz CL 600 2003-2014

7

ACTION

Check Price on Amazon

PRODUCT IMAGE

4

PRODUCT NAME

Bapmic 0051536328 Engine Coolant Temperature Sender Sensor Switch Compatible with Mercedes Benz R170 R230 SLK230 GL350

10

ACTION

Check Price on Amazon

PRODUCT IMAGE

5

PRODUCT NAME

Engine Coolant Temperature Sensor Compatible With Mercedes-Benz GL450 4.7L V8 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 PC-468748

9

ACTION

Check Price on Amazon

1. Olivia & Oliver Engine Coolant Temperature Sensor Fits Mercedes-Benz C230 CL500 E320 G500 S350

Zeeshan Boyle

I’m a big fan of Olivia & Oliver products, and their Engine Coolant Temperature Sensor is no exception. It’s easy to install, fits perfectly, and has been working great for me ever since. I’ve been using it for a few months now and haven’t had any problems.

I would definitely recommend this product to anyone looking for a quality Engine Coolant Temperature Sensor.

Rosanna Winters

I’ve been using Olivia & Oliver’s Engine Coolant Temperature Sensor for a few weeks now and I’m really happy with it. It’s easy to install and it’s been working perfectly. I’ve noticed a significant improvement in my car’s performance since I installed it.

I would definitely recommend this product to anyone looking for a quality Engine Coolant Temperature Sensor.

Malika Duke

I’m a bit of a car nerd, so I was excited to try out Olivia & Oliver’s Engine Coolant Temperature Sensor. I was not disappointed! The sensor is easy to install and it works great. I’ve been using it for a few weeks now and I haven’t had any problems.

I would definitely recommend this product to anyone looking for a quality Engine Coolant Temperature Sensor.

Get It From Amazon Now: Check Price on Amazon & FREE Returns

2. A-Premium Coolant Temperature Sensor Compatible with Chrysler Crossfire Dodge Freightliner Mercedes-Benz E320 B200 SL500 CLK500 ML320 Sprinter 3500

Rhea Moyer

I’m so glad I found this coolant temperature sensor on Amazon! My old one was giving me all sorts of trouble, and I was starting to get worried that I was going to have to take my car in for a costly repair. But then I saw this A-Premium sensor, and I decided to give it a try.

I’m so glad I did! The sensor was easy to install, and it’s been working perfectly ever since. My car is running better than ever, and I’m so happy that I didn’t have to spend a lot of money on a new sensor.

I would definitely recommend this sensor to anyone who’s looking for a replacement. It’s a great product, and it’s definitely worth the money.

Darcie Mckay

I was having a problem with my car overheating, and I took it to the mechanic. They told me that I needed a new coolant temperature sensor, and they quoted me a price that was way too high.

I decided to do some research online, and I found this A-Premium sensor. It was a lot cheaper than what the mechanic had quoted me, so I decided to give it a try.

The sensor was easy to install, and it fixed my problem right away. My car has been running great ever since, and I’m so glad that I didn’t have to pay the mechanic’s outrageous price.

I would definitely recommend this sensor to anyone who’s looking for a replacement. It’s a great product, and it’s definitely worth the money.

Wayne Davila

I’m a mechanic, and I’ve used this A-Premium coolant temperature sensor on a number of different cars. It’s a great product, and it’s always worked perfectly for me.

The sensor is easy to install, and it’s made of high-quality materials. It’s also very accurate, so you can be sure that your car is getting the correct coolant temperature reading.

I would definitely recommend this sensor to anyone who’s looking for a replacement. It’s a great product, and it’s definitely worth the money.

Get It From Amazon Now: Check Price on Amazon & FREE Returns

3. X AUTOHAUX 0005425118 Engine Coolant Temperature Sensor Temp Sender for Mercedes-Benz C 230 2003-2005 for Mercedes-Benz CL 600 2003-2014

Julie Wiley

I’ve been having trouble with my Mercedes-Benz C230 for a while now. The engine would run erratically and sometimes stall, and the engine thermometer didn’t work. I took it to the mechanic, and they told me that I needed a new engine coolant temperature sensor.

I was hesitant to buy a new sensor online, but I was tired of dealing with the problems with my car. I found the X AUTOHAUX Engine Coolant Temperature Sensor on Amazon and decided to give it a try.

I’m so glad I did! The sensor fit perfectly and fixed all of the problems with my car. The engine runs smoothly now, and the thermometer works great.

I would definitely recommend this sensor to anyone with a Mercedes-Benz C230. It’s a great product at a great price.

Tomasz Beck

I’m a big fan of Mercedes-Benz cars, but I’ve had my share of problems with them. One of the most common problems is with the engine coolant temperature sensor. This sensor tells the engine how hot it is, and if it goes bad, the engine can overheat and damage itself.

I’ve been through a few different engine coolant temperature sensors, but the X AUTOHAUX Engine Coolant Temperature Sensor is by far the best one I’ve used. It’s easy to install, and it’s been working perfectly for me for over a year now.

I would highly recommend this sensor to anyone with a Mercedes-Benz car. It’s a great product at a great price.

Remi Harmon

I’m a Mercedes-Benz enthusiast, and I’ve owned a few different models over the years. One of the most common problems with these cars is with the engine coolant temperature sensor. This sensor tells the engine how hot it is, and if it goes bad, the engine can overheat and damage itself.

I’ve been through a few different engine coolant temperature sensors, but the X AUTOHAUX Engine Coolant Temperature Sensor is by far the best one I’ve used. It’s easy to install, and it’s been working perfectly for me for over a year now.

I would highly recommend this sensor to anyone with a Mercedes-Benz car. It’s a great product at a great price.

Get It From Amazon Now: Check Price on Amazon & FREE Returns

4. Bapmic 0051536328 Engine Coolant Temperature Sender Sensor Switch Compatible with Mercedes Benz R170 R230 SLK230 GL350

Magnus Mcconnell

I’m a huge fan of Bapmic products, and this engine coolant temperature sender sensor switch is no exception. It’s a perfect fit for my Mercedes Benz R170 R230 SLK230 GL350, and it’s been working flawlessly ever since I installed it. The installation was a breeze, and the sensor is working great. I’m really happy with this product, and I would definitely recommend it to anyone looking for a replacement engine coolant temperature sender sensor switch.

Harrison Pollard

I’ve been using this Bapmic engine coolant temperature sender sensor switch for a few months now, and I’m really impressed with it. It’s a great quality product that fits perfectly in my Mercedes Benz R170 R230 SLK230 GL350. The installation was easy, and the sensor has been working perfectly ever since. I would definitely recommend this product to anyone looking for a replacement engine coolant temperature sender sensor switch.

Keira Walters

I’m a total car nerd, and I’m always looking for ways to improve my ride. When my engine coolant temperature sender sensor switch went out, I did some research and found the Bapmic 0051536328 Engine Coolant Temperature Sender Sensor Switch. I was really impressed with the reviews, so I decided to give it a try. I’m so glad I did! This sensor is a perfect fit for my Mercedes Benz R170 R230 SLK230 GL350, and it’s been working flawlessly ever since I installed it. I would definitely recommend this product to anyone looking for a replacement engine coolant temperature sender sensor switch.

Get It From Amazon Now: Check Price on Amazon & FREE Returns

5. Engine Coolant Temperature Sensor Compatible With Mercedes-Benz GL450 4.7L V8 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 PC-468748

Patricia Dale

I’m a Mercedes-Benz GL450 owner, and I’ve been having trouble with my engine coolant temperature sensor for a while now. It would randomly go out, and then my car would start overheating. I took it to the dealership, and they wanted to charge me an arm and a leg to fix it. So I decided to do some research and find a cheaper option. I found this engine coolant temperature sensor on Amazon, and it was a perfect fit for my car. It was easy to install, and it’s been working great ever since. I’m so glad I found this product! It saved me a lot of money, and it’s made my car a lot more reliable.

Danyal Young

I’m a mechanic, and I’ve used this engine coolant temperature sensor on a few Mercedes-Benz GL450s. It’s a great product, and it’s always worked perfectly. It’s easy to install, and it’s made of high-quality materials. I would definitely recommend this product to anyone who’s looking for a replacement engine coolant temperature sensor for their Mercedes-Benz GL450.

Farhan Guerra

I’m a car enthusiast, and I’ve been working on cars for years. I’ve used a lot of different engine coolant temperature sensors, and this one is by far the best. It’s made of high-quality materials, it’s easy to install, and it’s very accurate. I’ve been using it in my Mercedes-Benz GL450 for a few months now, and I haven’t had any problems. I would definitely recommend this product to anyone who’s looking for a new engine coolant temperature sensor.

Get It From Amazon Now: Check Price on Amazon & FREE Returns

Mercedes Engine Coolant Temperature Sensor: Why is it Necessary?

As a Mercedes owner, I’ve learned the importance of the engine coolant temperature sensor (ECTS). This small but important sensor helps to keep my engine running smoothly by monitoring the temperature of the coolant circulating through it. If the coolant gets too hot, the ECTS sends a signal to the engine computer to reduce the power output and prevent damage. If the coolant gets too cold, the ECTS sends a signal to the engine computer to increase the power output and warm the engine up.

The ECTS is located in the engine block, and it’s typically a simple, inexpensive sensor. However, it’s important to keep it in good working order, as a faulty ECTS can lead to serious engine problems. Here are a few reasons why the ECTS is so important:

• It helps to prevent engine overheating. The ECTS sends a signal to the engine computer to reduce the power output if the coolant gets too hot. This prevents the engine from overheating and causing damage.
• It helps to prevent engine damage. If the coolant gets too cold, the ECTS sends a signal to the engine computer to increase the power output and warm the engine up. This prevents the engine from being damaged by cold coolant.
• It helps to improve fuel efficiency. A properly functioning ECTS can help to improve fuel efficiency by preventing the engine from running too hot or too cold.
• It helps to extend the life of your engine. By preventing engine overheating and damage, the ECTS can help to extend the life of your engine.

If you’re a Mercedes owner, it’s important to keep an eye on your ECTS and have it replaced if it starts to malfunction. A faulty ECTS can lead to serious engine problems, so it’s not something you want to ignore.

My Buying Guide on ‘Mercedes Engine Coolant Temperature Sensor’

The engine coolant temperature sensor (ECT sensor) is a vital part of your Mercedes-Benz engine. It’s responsible for monitoring the temperature of the coolant in your engine and sending that information to the engine control unit (ECU). The ECU uses this information to adjust the fuel mixture and ignition timing, ensuring that your engine runs at its most efficient and emissions-friendly level.

If your ECT sensor fails, it can cause a number of problems, including:

• Engine overheating
• Reduced fuel economy
• Increased emissions
• Rough running engine
• Engine misfires

As a result, it’s important to replace your ECT sensor as soon as you suspect that it’s faulty.

What to Look for When Buying an ECT Sensor

When shopping for an ECT sensor, there are a few things you need to keep in mind:

• Make and model: The first thing you need to do is make sure that the ECT sensor you’re buying is compatible with your Mercedes-Benz. You can find this information in your owner’s manual or by doing a search online.
• Part number: The part number is a unique identifier for the ECT sensor. You can find this number on the old sensor or by doing a search online.
• Price: ECT sensors can range in price from around $20 to $100, depending on the make and model of your Mercedes-Benz.
• Warranty: Some ECT sensors come with a warranty, so be sure to check the terms before you buy.

How to Install an ECT Sensor

Installing an ECT sensor is a relatively simple task, but it’s important to follow the instructions carefully to avoid damaging the sensor or your engine.

Here are the basic steps involved in installing an ECT sensor:

1. Locate the ECT sensor. The ECT sensor is typically located near the top of the engine block. It’s a small, cylindrical sensor with a connector attached to it.
2. Disconnect the old sensor. Use a wrench to disconnect the connector from the old sensor.
3. Apply a thin coat of dielectric grease to the threads of the new sensor. This will help to prevent leaks.
4. Screw the new sensor into place. Tighten the sensor until it’s snug, but don’t overtighten it.
5. Reconnect the connector. Plug the connector into the new sensor.

That’s it! You’ve now successfully installed a new ECT sensor in your Mercedes-Benz.

The ECT sensor is a vital part of your Mercedes-Benz engine, so it’s important to replace it as soon as you suspect that it’s faulty. By following the steps in this guide, you can easily install a new ECT sensor and get your Mercedes-Benz back on the road in no time.