Mercedes-Benz E320 Car Thermostat Replacement at your home or office.

Our mobile mechanics offer services 7 days a week. Upfront and transparent pricing.

Estimate price near me

Service Location

Customer Ratings

(326)

Included for free with this service

Online Booking

Mechanic comes to you

12-month / 12k-mile warranty

Free 50 point safety inspection

Our certified mobile mechanics can come to your home or office 7 days a week between 7 AM and 9 PM.

Customer Ratings

(326)

Car Thermostat Replacement Service

How much does a Car Thermostat Replacement cost?

On average, the cost for a Mercedes-Benz E320 Car Thermostat Replacement is $169 with $74 for parts and $95 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
2008 Mercedes-Benz E320V6-3.0L Turbo DieselService typeCar Thermostat ReplacementEstimate$444.87Shop/Dealer Price$539.21 - $763.19
2001 Mercedes-Benz E320V6-3.2LService typeCar Thermostat ReplacementEstimate$358.27Shop/Dealer Price$439.13 - $626.50
2005 Mercedes-Benz E320V6-3.2LService typeCar Thermostat ReplacementEstimate$358.27Shop/Dealer Price$439.13 - $626.50
1999 Mercedes-Benz E320V6-3.2LService typeCar Thermostat ReplacementEstimate$358.27Shop/Dealer Price$439.07 - $626.40
2006 Mercedes-Benz E320L6-3.2L Turbo DieselService typeCar Thermostat ReplacementEstimate$663.28Shop/Dealer Price$816.10 - $1191.61
1996 Mercedes-Benz E320L6-3.2LService typeCar Thermostat ReplacementEstimate$242.05Shop/Dealer Price$296.35 - $419.79
2004 Mercedes-Benz E320V6-3.2LService typeCar Thermostat ReplacementEstimate$365.27Shop/Dealer Price$445.80 - $632.91
2005 Mercedes-Benz E320L6-3.2L Turbo DieselService typeCar Thermostat ReplacementEstimate$681.28Shop/Dealer Price$836.79 - $1218.53
Show example Mercedes-Benz E320 Car Thermostat Replacement prices

What is an engine cooling system thermostat and how does it work?

The car's engine cooling system thermostat is a small valve within a cooling system passageway that opens and closes in response to the temperature of the circulating engine coolant. When your car is first started and the coolant is cold, the valve in the thermostat will be in the closed position, circulating the coolant flow only within the engine instead of flowing to the radiator, which allows the engine to warm up fast, promoting fuel efficiency, low emissions, and reduced engine deposits. Once the engine coolant reaches the design temperature, usually around 195 degrees, the valve will open and close as you drive in order to maintain a coolant temperature typically between 195 to 225 degrees Fahrenheit.

Thermostat

When to consider replacing the engine cooling system thermostat:

  • Engine overheats. A thermostat with the valve stuck closed is a common cause of engine overheating. However, since there are other causes of overheating, a mechanic will thoroughly inspect the cooling system prior to condemning the thermostat. Since it is usually not known how badly the engine overheated, the mechanic will also try to determine if there is evidence that the cylinder head gasket was blown. If so, it would be repaired prior to replacing the thermostat.
  • Temperature gauge reads too low or too high. Thermostats can get sticky, causing the engine temperature to stray from the optimal range. Your dash-mounted temperature gauge will notify you of this malfunction.
  • Cooling system repairs. All thermostats eventually fail. Therefore, if the cooling system is already open for major repairs, such as water pump or radiator replacement, it is recommended to install a new thermostat simply as insurance against future breakdown.

How do mechanics replace the engine cooling system thermostat?

  • Once the engine is completely cold, the radiator cap is loosened and enough coolant is drained from the radiator so the coolant level is below the thermostat housing.
  • The thermostat housing is removed and the thermostat and gasket are extracted. Note that some cars have more than one cooling system thermostat and both might need replacement.
  • All mounting surfaces on the thermostat housing are cleaned of old gasket material. A new gasket is applied and the thermostat is re-installed in the correct orientation and with the temperature sensing cylinder facing downward towards the engine.
  • The thermostat housing bolts are tightened to original equipment manufacturer (OEM) specifications using a calibrated inch-pound torque wrench.
  • The cooling system is refilled with the appropriate coolant type and the system is fully bled of all air.
  • The car engine is run until the normal operating temperature is reached, and while taking precautions with the hot coolant, the coolant level is rechecked while confirming there is flow through the radiator — either visually or with an infrared temperature gun. This will confirm the thermostat is open. Finally, the engine is checked for leaks.

Is it safe to drive with an engine cooling system thermostat problem?

No. If it has been determined that there is a thermostat problem, it should be repaired right away. Failure to do so can cause substantial and costly damage to the engine.

When replacing the engine cooling system thermostat keep in mind:

  • Engine overheating due to causes other than a faulty thermostat, will themselves damage a thermostat. Therefore, always replace the thermostat if the engine overheats, even if the thermostat was not the initial cause of the overheating.
  • The thermostat should be replaced anytime you have major work done on the coolant system. It is convenient and costs little during such repairs and insurance against future breakdown.
  • OEM thermostats are the best ones to use and you can request your mechanic to install only the OEM thermostat. Dealer supplied, OEM thermostats are sometimes more costly but are generally higher quality and specifically engineered for your car.

Fast and easy service at your home or office

Backed by 12-month, 12.000-mile guarantee


Meet some of our expert Mercedes-Benz mechanics

Real customer reviews from Mercedes-Benz owners like you.

Excellent Rating

(326)

Rating Summary
297
12
4
4
9
297
12
4
4
9

Terry

31 years of experience
99 reviews
Terry
31 years of experience
Mercedes-Benz E320 V6-3.2L - Parking / Emergency Brake does not work - Hurst, Texas
Your entire process from initial contact to resolution of car problem to payment and closure was handled very professionally. I have and will continue to recommend your mechanic.com to anyone who needs service. Matter of fact, I will be using you again this next week. Thank you for a job very well done Jerry Stone

Chris

22 years of experience
2198 reviews
Chris
22 years of experience
Mercedes-Benz E320 V6-3.2L - Oil Change - Irvine, California
Showed up on time, worked quick and was very thorough with explaining the overall state of the car.

Carlos

28 years of experience
483 reviews
Carlos
28 years of experience
Mercedes-Benz E320 L6-3.2L - Window is not working - San Juan Capistrano, California
very hard worker to fix problems cause by your other mechanic

H

26 years of experience
828 reviews
H
26 years of experience
Mercedes-Benz E320 V6-3.2L - Fuel Pump - Sunnyvale, California
He shared his knowledge with me in which I not only appreciated, but I was educated on something I did not know. I am happy with his services and expertise.

Excellent Rating

(326)

Rating Summary
297
12
4
4
9
297
12
4
4
9
Number of Mercedes-Benz E320 services completed
3586+
services done by our mechanics
TOTAL NUMBER OF EXPERT Mercedes-Benz MECHANICS
1000+
experts on our platform

Recent articles & questions

A Buyer’s Guide to the 2012 Toyota RAV4
While While the Honda CR-V might have been the pioneer of the compact SUV market, there’s no question that the 2012 Toyota RAV4 is king of the class. Not only does the RAV4 come with your choice of either a...
How to Buy a Good Quality Brake Hose
Brake Brake hoses, sometimes used interchangeably with the term “brake lines,” carry brake fluid between the master cylinder and the wheel cylinder or brake calipers - depending upon the type of brakes you have. The pressure from the brake fluid...
How to Replace an Exhaust Gas Recirculation (EGR) Temperature Sensor
Exhaust gas recirculation (EGR) temperature sensors monitor the EGR cooler's operation. One is on the exhaust manifold and one is near the EGR valve.

Bad Ignition/electrical issue - takes several cranks before it starts!

Hello there, you have a few different faults going on with your 2007 Chevrolet Impala. A vehicle should not have to crank long before it starts unless there is a fault. Given the codes you have listed there are a...

what's up?

I have taught automotive maintenance technology for over 8 years and have over 35 years total experience as a mechanic. I can tell you that it is a career that can make you a good living. The profession is changing...

Timing belt problem - 2004 Nissan Maxima

Actually yes it is normal. I will go through a few things that you may or may not have done and hopefully we can get your issue resolved. When you put your crankshaft pulley on did you use an impact?...

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1 (855) 347-2779 · hi@yourmechanic.com