Mercedes-Benz 420SEL Car is running hotter than normal 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

(18)

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

(18)

Car is running hotter than normal Inspection Service

How much does a Car is running hotter than normal Inspection cost?

On average, the cost for a Mercedes-Benz 420SEL Car is running hotter than normal Inspection is $95 with $0 for parts and $95 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
1989 Mercedes-Benz 420SELV8-4.2LService typeCar is running hotter than normal InspectionEstimate$114.99Shop/Dealer Price$132.49 - $145.62
1990 Mercedes-Benz 420SELV8-4.2LService typeCar is running hotter than normal InspectionEstimate$94.99Shop/Dealer Price$112.52 - $125.67
1991 Mercedes-Benz 420SELV8-4.2LService typeCar is running hotter than normal InspectionEstimate$94.99Shop/Dealer Price$112.52 - $125.67
1988 Mercedes-Benz 420SELV8-4.2LService typeCar is running hotter than normal InspectionEstimate$94.99Shop/Dealer Price$112.48 - $125.60
1986 Mercedes-Benz 420SELV8-4.2LService typeCar is running hotter than normal InspectionEstimate$94.99Shop/Dealer Price$112.55 - $125.72
1987 Mercedes-Benz 420SELV8-4.2LService typeCar is running hotter than normal InspectionEstimate$94.99Shop/Dealer Price$112.52 - $125.67
Show example Mercedes-Benz 420SEL Car is running hotter than normal Inspection prices

An observant driver keeps an eye on the various gauges in the dash – they provide important information. One of the most important is the temperature gauge, which tells you how hot the engine coolant is. Every car has its own “normal” range, but if you’ve noticed that your car is running hotter than normal, it may be a sign of an impending problem.

How this system works:

Your coolant system is designed to help remove heat from the engine during operation. The engine creates a great deal of heat, and coolant is circulated throughout to absorb heat, and then remove it. The coolant flows through the engine, and then back into the radiator. Fins built into the radiator help disperse the heat as air passes over them.

There are several important components here. The radiator is probably the most visible, but you also have an upper and lower radiator hose, a thermostat, the water pump, a coolant reservoir and more. All are critical to the operation of the system, and if one starts to “go south”, you may experience higher operating temperatures than normal.

Several potential problems could cause your car to start running hotter than normal without overheating. It could also be something as simple as sitting in bumper-to-bumper traffic on a hot summer day.

Common reasons for this to happen:

  • Low Coolant: With any engine temperature related issue, the first thing to check is the level of the coolant. If it’s low, then the system doesn’t have enough fluid to do its job correctly. Low fluid can be caused by many things, including not properly topping it off after draining the old coolant, and leaks from various parts, such as one of the radiator hoses, the water pump gasket, a damaged or open bleeder valve and more.

  • Sticking Thermostat: This could be a sign that your thermostat is about to fail. If it has started sticking, but hasn’t quite given up the ghost, it’s possible to see higher engine operating temperatures without overheating.

  • Damaged Radiator Cap: Most modern radiator caps are pressure caps. They’re designed to increase the boiling point of coolant by pressurizing the system. If your cap is failing (the seal is generally the problem), then you can expect to see higher than usual engine temperatures.

  • Deteriorating Hose: Your radiator hoses are responsible for transporting coolant to and from the radiator. Over time, they age and deteriorate. If a hose has gone “soft”, it’s possible that is has partially collapse and created a bottleneck that limits coolant flow, which will increase the temperature.

  • Faulty Temperature Sensor: It’s possible that the temperature sensor on the engine block is faulty, and sending inaccurate information to the car’s computer/dash gauge. In this instance, the reading is incorrect and your car’s engine temperature is most likely normal.

What to expect:

A professional mobile mechanic will come to your home or office to inspect both the temperature gauge and your car’s cooling system. The mechanic will then provide a detailed inspection report that includes the scope and cost of the necessary repairs.

How it's done:

The mechanic will inspect the coolant level, the condition of the hoses, the radiator cap and more. It may also be necessary to test drive the vehicle to get the coolant up to operating temperature to verify the higher than usual temperature reading.

How important is this service?

A temperature gauge reading slightly higher than normal may or may not be a sign that something’s wrong. If you’re stuck in traffic on a hot day, this would be normal. However, if you’ve noticed the car is running hotter than normal without any mitigating factors, it’s a sign that something’s going wrong. One of our professional mechanics can diagnose and repair the issue before it becomes a serious problem.

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

(18)

Rating Summary
17
0
0
1
0
17
0
0
1
0

David

32 years of experience
107 reviews
David
32 years of experience
Mercedes-Benz 420SEL V8-4.2L - Pre-purchase Car Inspection - Phoenix, Arizona
I felt comfortable with David working on my vehicle. I felt he was honest with me and will recommend his services, as well as, yourmechanics' services to friends and family.

Luther

16 years of experience
57 reviews
Luther
16 years of experience
Mercedes-Benz 420SEL V8-4.2L - Inspection / Diagnostics - Atlanta, Georgia

Carlos

28 years of experience
516 reviews
Carlos
28 years of experience
Mercedes-Benz 420SEL V8-4.2L - Serpentine/Drive Belt - Ontario, California
Carlos came on time (unlike others who cancelled the appointment several times). He came, TWICE because of my car needed more parts than expected. Great job, friendly, very professional, I HIGHLY recommend him, and will make sure next time - if needed - he will be the one I ask for. Thank you Carlos

Peter

28 years of experience
526 reviews
Peter
28 years of experience
Mercedes-Benz 420SEL V8-4.2L - Car is not starting - Pacoima, California
satiesfied

Excellent Rating

(18)

Rating Summary
17
0
0
1
0
17
0
0
1
0
Number of Mercedes-Benz 420SEL services completed
198+
services done by our mechanics
TOTAL NUMBER OF EXPERT Mercedes-Benz MECHANICS
1100+
experts on our platform

Recent articles & questions

Infiniti Certified Pre-Owned (CPO) Car Program
Drivers Drivers who are in the market for a used Infiniti vehicle may want to check out cars under their certified pre-owned program. Many manufacturers have a certified pre-owned (CPO) program, and each one is set up differently. Read on...
Disabled Driver Laws and Permits in Montana
In In Montana, the MVD (Montana Motor Vehicle Division) issues special plates and permits to people who have permanent or temporary disabilities. If you are disabled, then you can be eligible for placards and plates that will allow you to...
P2093 OBD-II Trouble Code: A Camshaft Position Actuator Control Circuit High Bank 2
P2093 P2093 code definition The P2093 code is a general OBD-II diagnostic trouble code indicating a fault with the “A” camshaft position actuator control circuit high bank 2. What the P2093 code means The camshaft position sensor “A” is indicating...

Hello, I have a 1997 Nissan Maxima and it has no compression reading from cylinder #2.

Hello. It is possible that you have a bent valve but instead you may have a warped valve seat. Whether or not that is the case what is most likely causing the lack of compression in your engine is a...

I'm getting a po420 code is it possible it could be due to my rear catalytic converter even though there's no sensors after it? Or

The sensor after the first catalyst is the one giving you code P0420 and should be replaced if the catalyst is good and you have no other codes in the system.

My 2005.1 Audi S4 Avant starts when the engine is cold just fine, however when it's warmed up it won't start. Cranks won't catch

Hi there. When a car is hard to start when it is warmed up or hot, it's typically due to a fuel system issue; ranging from a mass air flow sensor that is faulty, clogged fuel injectors or a throttle...

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 (844) 997-3624 · hi@yourmechanic.com