Mercedes-Benz SL500 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

(99)

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

(99)

Car Thermostat Replacement Service

How much does a Car Thermostat Replacement cost?

On average, the cost for a Mercedes-Benz SL500 Car Thermostat Replacement is $209 with $104 for parts and $104 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
2001 Mercedes-Benz SL500V8-5.0LService typeCar Thermostat ReplacementEstimate$439.54Shop/Dealer Price$529.19 - $727.24
2002 Mercedes-Benz SL500V8-5.0LService typeCar Thermostat ReplacementEstimate$403.54Shop/Dealer Price$493.24 - $691.33
2003 Mercedes-Benz SL500V8-5.0LService typeCar Thermostat ReplacementEstimate$413.62Shop/Dealer Price$504.59 - $698.62
1994 Mercedes-Benz SL500V8-5.0LService typeCar Thermostat ReplacementEstimate$312.87Shop/Dealer Price$384.20 - $554.92
1996 Mercedes-Benz SL500V8-5.0LService typeCar Thermostat ReplacementEstimate$322.37Shop/Dealer Price$395.53 - $567.62
1995 Mercedes-Benz SL500V8-5.0LService typeCar Thermostat ReplacementEstimate$322.37Shop/Dealer Price$395.50 - $567.56
2000 Mercedes-Benz SL500V8-5.0LService typeCar Thermostat ReplacementEstimate$403.62Shop/Dealer Price$490.66 - $681.73
1999 Mercedes-Benz SL500V8-5.0LService typeCar Thermostat ReplacementEstimate$403.62Shop/Dealer Price$491.83 - $683.79
Show example Mercedes-Benz SL500 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

(99)

Rating Summary
92
7
0
0
0
92
7
0
0
0

Michael

16 years of experience
32 reviews
Michael
16 years of experience
SL500 2005 - Electric Problems - Hillcrest Heights, MD
Good

Michael

19 years of experience
168 reviews
Michael
19 years of experience
SL500 2002 - Spark Plugs - Fontana, CA
this guy is alright he did a very good job

Rafael

25 years of experience
65 reviews
Rafael
25 years of experience
SL500 1994 - Brake Pads - South San Francisco, CA
Great work

Raymond

35 years of experience
252 reviews
Raymond
35 years of experience
SL500 2001 - Fuel Filter - Las Vegas, NV
Outstanding!

Excellent Rating

(99)

Rating Summary
92
7
0
0
0
92
7
0
0
0
Number of Mercedes-Benz SL500 services completed
1089+
services done by our mechanics
TOTAL NUMBER OF EXPERT Mercedes-Benz MECHANICS
1000+
experts on our platform

Recent articles & questions

P0490 OBD-II Trouble Code: Exhaust Gas Recirculation "A" Control Circuit High
P0490 means the PCM has detected an abnormally high voltage within the exhaust gas recirculation system, often due to clogging.
How to Replace a Fuel Pump Shut Off Switch
The fuel pump shut off switch may be faulty when the Check Engine Light comes on or if the engine suddenly turns off while driving.
How to Clean Your Catalytic Converter
Before looking into a catalytic converter cleaner, check it for clogging, internal part damage, and poor fuel economy.

High RPMs on a 4-cylinder engine

Your vehicle redlines at 6,600 RPM. If you have an automatic transmission in your vehicle, don't worry. A properly operating automatic transmission (https://www.yourmechanic.com/article/how-an-automatic-transmission-works) is designed to keep your engine in the correct operating range. The transmission control module will adjust...

Why is the CVT transmission whining noise so loud when driving?

Hi there. From the description you have given, I'm lead to believe your vehicle has 65,000 miles and not 6,500 miles. Changing the CVT (continuously variable transmission) fluid (https://www.yourmechanic.com/services/transmission-fluid-service) more than likely will not quiet the transmission. It is very...

Short in Amps of mustang causes battery drain. With fuse removed mustang runs fine. Will replacing amps fix this?

If there is water leaking into the convertible top well and trunk area, this should be addressed first. Replacing electronic components while still having a water leak issue will only cause damage to the replacement components. If the leak has...

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