Mercedes-Benz 350SD Temperature Warning Light is on Inspection at your home or office.

Our certified mobile mechanics come to you 7 days a week between 7 AM and 9 PM.

Estimate price near me

Service Location

Customer Ratings

(5,730)

How A Diagnostic Works

Instantly book a certified mobile mechanic to come to you

Mechanic diagnoses the problem and quotes necessary repairs

Your vehicle is ready to go

Fair, upfront & transparent pricing for all services

Our certified mobile mechanics can come to you now.

Customer Ratings

(5,730)

Temperature Warning Light is on Inspection Service

How much does a Temperature Warning Light is on Inspection cost?

On average, the cost for a Mercedes-Benz 350SD Temperature Warning Light is on Inspection is $95 with $0 for parts and $95 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
1991 Mercedes-Benz 350SDL6-3.4L Turbo DieselService typeTemperature Warning Light is on InspectionEstimate$114.99Shop/Dealer Price$132.49 - $145.62
Show example Mercedes-Benz 350SD Temperature Warning Light is on Inspection prices

Overheating is the most common cause of an irreparably damaged engine, so you should always take a temperature warning light seriously. The temperature warning light is on the dashboard gauge cluster and usually contains the words “temp” or “engine overheating.” Or, it may simply show a picture of a thermometer.

Most vehicles also have an engine temperature gauge that shows just how hot the engine is. When the temperature warning light illuminates, the first thing to check is this gauge, to determine the severity of the overheating issue.

How this system works:

With the exception of older, air-cooled vehicles, cars rely on a liquid called coolant (or antifreeze) to keep the engine at an optimal temperature. Coolant is a mixture of water and ethylene glycol, and it circulates around the engine block and absorbs excess heat, which keeps the engine from overheating. The coolant converts that heat to air in the radiator, and then the air is emitted, at which time the coolant is ready to absorb more heat. Without coolant, the engine would quickly ruin itself with its own heat production.

Common reasons for this to happen:

  • Coolant is low or weak: The most common culprit when an engine overheats is low or weak coolant. If your car doesn’t have enough coolant, then it can’t absorb enough heat. While your car will naturally lose small amounts of coolant over the years, a leak is the most likely cause of low coolant levels.

The proper ratio of coolant to water can also get distorted, resulting in a problem. Too little or even too much antifreeze can dramatically lower the boiling point of the coolant. A proper ratio of antifreeze to water is 50/50 to 60/40, depending on the vehicle.

  • Broken radiator fan shroud: The radiator fan shroud directs the airflow across the radiator so the air can absorb the coolant’s heat. When the fan shroud breaks or becomes dislodged, air fails to enter the radiator, and the coolant will no longer have a place to direct the transfer of heat.

  • Broken or missing air dam: Along with the shroud, some vehicles have an air dam (or deflector) underneath the vehicle. If this is broken or missing then the air can pass underneath the vehicle but not also through the radiator, which will cause overheating. These air dams are essential in newer vehicles, as they force the air through the fan shroud.

  • Faulty coolant temperature sensor: The temperature sensor takes constant readings of the coolant temperature and sends that information to the engine control unit. Based on the temperature of the coolant, the engine control unit adjusts the ignition timing, the fuel injector pulse, and the operation of the electric cooling fan.

  • Bad water pump: The water pump is responsible for keeping the coolant cycling throughout the engine. After the coolant transfers its heat energy to the air, the water pump recirculates it around the engine so that it can absorb more heat. The most common water pump problems are a leaking pump, bad bearings, or an impeller that has rotted away due to a low coolant ratio.

  • Stuck thermostat: The thermostat acts as a dam for the coolant. When the engine first turns on, and it is still cold, the thermostat keeps the coolant from circulating, which allows the engine to warm up as quickly as possible. Once the engine has reached its operating temperature, the thermostat opens and allows the coolant to circulate. A stuck thermometer may stay permanently sealed and therefore keep the coolant from reaching the engine block.

The thermostat may also stick open. This will not usually result in overheating, but it will waste gas.

  • Broken engine cooling fan: The engine has a cooling fan that is deployed when the coolant needs some extra help. When the coolant temperature sensor notices that the coolant temperature is getting too high, the engine control unit (on newer vehicles) will initiate the cooling fan to reduce the temperature.

  • Broken thermostatic fan clutch: Older vehicles use a thermostatic fan clutch to engage the engine cooling fan, which is mounted to the fan blades. The fan clutch uses a bi-metallic spring that tightens when the temperature increases. This acts as a “high speed” option for the fan, and when engaged, it draws more air across the radiator.

  • Blown head gasket: The head gaskets sit between the engine block and the cylinder heads, and keep coolant from entering the engine’s oil and combustion chamber. When a gasket blows and coolant seeps in, the issue is not only that the engine will overheat, but also that damage may be done to the catalytic converter and oxygen sensors due to contamination from the coolant.

What to expect:

A top-rated mobile mechanic will come to your home or office to determine the cause of the temperature warning light turning on and the source of the overheating, and will then provide a detailed inspection report that includes the scope and cost of the necessary repairs.

How important is this service?

An overheating engine is extremely dangerous. It is not safe to drive a vehicle with an overheating engine, or you may ruin the engine completely and put yourself at risk. As soon as you notice the light come on, pull over. If there is no place to safely pull over, turn off your radio and other electrical units, and turn your heat on high (this will funnel some of the hot engine air into the cabin). As soon as you can safely pull over, do so, and then book one of our mechanics to perform an inspection.

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

(5,730)

Rating Summary
5,332
192
54
29
123
5,332
192
54
29
123

Andrew

11 years of experience
872 reviews
Andrew
11 years of experience
Mercedes-Benz GLE350 V6-3.5L - Battery - Olathe, Kansas
Andrew did an excellent job on my car battery replacement. Very quick and professional Thanks!

Jeremy

20 years of experience
642 reviews
Jeremy
20 years of experience
Mercedes-Benz C300 L4-2.0L Turbo - Auxiliary Battery - Boynton Beach, Florida
Nice Guy. He knew what he was doing. Used OEM Parts. I would use him again.

Joseph

20 years of experience
21 reviews
Joseph
20 years of experience
Mercedes-Benz ML320 V6-3.2L - Power Steering Pump - San Jose, California
Excellent mechanic. He completed the car service in timely manner. Rate:10

Alexis

30 years of experience
94 reviews
Alexis
30 years of experience
Mercedes-Benz C32 AMG V6-3.2L Turbo - Pre-purchase Car Inspection - Miami, Florida
Alexis was great, very helpful answered all of my questions.

Excellent Rating

(5,730)

Rating Summary
5,332
192
54
29
123
5,332
192
54
29
123
Number of Mercedes-Benz services completed
63030+
services done by our mechanics
TOTAL NUMBER OF EXPERT Mercedes-Benz MECHANICS
1100+
experts on our platform

Recent articles & questions

A Buyer’s Guide to the 2012 Acura RL
The The 2012 Acura RL is a luxury four-door sedan that offers a decent amount of interior space and seating, as well as appreciable performance (although it’s limited to just a V6 engine). The RL ended production after the 2012...
4 Essential Things to Know About the Spare Tire in Your Car
No one likes the idea of being stranded because they get a flat tire. Having a spare in the vehicle is always...
How to Replace a Vent Oil Separator
A car engine has a vent oil separator that fails when vapors clog the separator, smoke emits from the exhaust, or the Check Engine Light illuminates.

How do I use the external USB port?

Your external USB port is located in your glove compartment. To connect to it, simply plug the USB cable from an external music device into the USB port. Then press the AUX button on the stereo system, and you’ll be...

How do I view Gauge mode?

In the Uplevel Message Center, there is a feature called Gauge mode. Gauge mode helpfully shows some of your vehicle's stats as a graphic. To view the options in Gauge mode. Use the Up or Down arrow keys on your...

Broken steering wheel

The issues you describe is a common fault with older ford trucks. It is most commonly caused by faulty bearings inside of the steering wheel column. To inspect the bearings, a technician will need to remove the steering wheel. I...

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