Mercedes-Benz S550 Electronic Control Relay Replacement Costs

Estimate price near me

Service Location

Customer Ratings

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.

See availability

Customer Ratings

Electronic Control Relay Replacement Service

How much does a Electronic Control Relay Replacement cost?

On average, the cost for a Mercedes-Benz S550 Electronic Control Relay Replacement is $141 with $46 for parts and $95 for labor. Prices may vary depending on your location.

Car	Service	Estimate	Shop/Dealer Price
2009 Mercedes-Benz S550V8-5.5L	Service typeElectronic Control Relay Replacement	Estimate$207.35	Shop/Dealer Price$247.94 - $330.34
2011 Mercedes-Benz S550V8-5.5L	Service typeElectronic Control Relay Replacement	Estimate$187.35	Shop/Dealer Price$227.97 - $310.39
2014 Mercedes-Benz S550V8-4.7L Turbo	Service typeElectronic Control Relay Replacement	Estimate$205.79	Shop/Dealer Price$243.51 - $334.12
2010 Mercedes-Benz S550V8-5.5L	Service typeElectronic Control Relay Replacement	Estimate$187.35	Shop/Dealer Price$227.93 - $310.32
2008 Mercedes-Benz S550V8-5.5L	Service typeElectronic Control Relay Replacement	Estimate$187.35	Shop/Dealer Price$228.00 - $310.44
2013 Mercedes-Benz S550V8-4.7L Turbo	Service typeElectronic Control Relay Replacement	Estimate$205.79	Shop/Dealer Price$243.51 - $334.12
2012 Mercedes-Benz S550V8-4.7L Turbo	Service typeElectronic Control Relay Replacement	Estimate$210.79	Shop/Dealer Price$248.37 - $338.88
2017 Mercedes-Benz S550V8-4.7L Turbo	Service typeElectronic Control Relay Replacement	Estimate$210.79	Shop/Dealer Price$248.74 - $339.54

Show example Mercedes-Benz S550 Electronic Control Relay Replacement prices

What is the Electronic Control Relay all about?

A wide range of electronic systems must work properly in order for the vehicle to operate. That means there is a need for several different controllers to ensure proper operation. One of the most important is the electronic control relay. You might be more familiar with the term “main relay” because of its role in vehicle performance.

The electronic control relay operates the fuel pump and sends power to the engine’s injectors. Without the main relay, fuel will not flow from the tank to the engine, and your injectors will not atomize gasoline into the combustion chamber. In short, your car wouldn’t run. Electronic control relays are subject to failure from a number of different problems, including outright failure, heat damage, cracked solder and more.

Keep in mind:

The electronic control relay may not operate, or may operate intermittently depending on the source of the trouble.
A number of other problems can masquerade as a main relay failure, so it’s vital that you have one of our expert mechanics diagnose the issue.

How it's done:

The electronic control relay is located and accessed then verified it needs replaced
The defective relay is removed from the vehicle
The new electronic relay is installed
The components that the electronic relay operates are checked for proper operation
The vehicle is road tested for proper operation

Our recommendation:

Traditional turnkey ignition the relay will click three times during the starting process. If you listen closely, you should hear a single click when you turn the ignition to “on”. You should hear another when the Check Engine light turns off. Finally, there should be a third click when you turn the key to the “start” position. If you do not hear a click at any of these three points, there may be a problem with the electronic control relay. Have one of our expert mechanics diagnose and replace the relay if required.

What common symptoms indicate you may need to replace the Electronic Control Relay?

Engine doesn’t start, especially in cold weather
Engine may not start a few minutes after turning it off
No sound from the fuel pump when the ignition key is turned to “On”

How important is this service?

Given the fact that the electronic control relay powers the fuel pump and your fuel injectors, it is essential to replace a faulty one. However, many other problems can present similar symptoms, so it’s very important to have the issue diagnosed by one of our expert mechanics.

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

(198)

Rating Summary

180

7

1

2

8

180

7

1

2

8

SEE REVIEWS NEAR ME

Herman

13 years of experience

86 reviews

Herman

13 years of experience

by Raleigh

Mercedes-Benz S550 V8-4.6L Turbo - Brake Pads Replacement (Front) - Miami, Florida

Herman was very pleasant, this was the first time using the service and Herman was patient and explained the process. He was friendly and very neat. When I require service again, I will be requesting him.

Cyrus

35 years of experience

110 reviews

Cyrus

35 years of experience

by Lenroy

Mercedes-Benz S550 V8-5.5L - Oxygen Sensor Replacement (Front/Upper/Upstream, Rear/Lower/Downstream) - Atlanta, Georgia

He was very knowledgeable and punctual.

Reginald

37 years of experience

99 reviews

Request Reginald

Reginald

37 years of experience

Request Reginald

by Christopher

Mercedes-Benz S550 V8-5.5L - Battery - Los Angeles, California

Very courteous and helpful. A solid mechanic who’s not afraid to get in there and get the job done. Also, considerate and customer focused

Bryan

2 years of experience

123 reviews

Bryan

2 years of experience

by Frank

Mercedes-Benz S550 V8-5.5L - Serpentine/Drive Belt Replacement - Fort Lauderdale, Florida

Job done right. Great customer service.

Excellent Rating

(198)

Rating Summary

180

7

1

2

8

180

7

1

2

8

SEE REVIEWS NEAR ME

Recent articles & questions

How Long Does an Anti-Lock Pressure Switch Last?

Anti-lock Anti-lock braking systems (ABS) are standard on late-model vehicles, and can greatly enhance your safety when braking in difficult conditions. If you have to stop suddenly, or if you are driving on slippery surfaces, the ABS prevents your wheels...

Veteran and Military Driver Laws and Benefits in Alaska

The The state of Alaska offers a number of benefits and perks for those Americans who have either served in an Armed Forces branch in the past, or are current active military members. Disabled veteran plate registration Veterans who qualify...

How to Replace a Car's Steering Rack Gearbox

The steering gearbox transmits the driver's steering wheel inputs to the wheels so that the car turns correctly. If damaged, it should be replaced.

Transfer case leak

Hi. The transfer case leak is a very common issue with these vehicles, especially at high mileage. The problem occurs when the pump for the transfer case begins rubbing against the side of the case. Over time, it will drill...

Key FOB has stopped working

You can get one from an aftermarket source but it will still have to go to the dealer to have it programmed if you cannot get a local mechanic to program it with a factory programmer. These programmers are only...

Steering noise, brake failure, dash lights on - 2004 Cadillac XLR

GM issued several service bulletins which appear to deal with this scenario (TSB Service Bulletin Number: 10342498 &10574399 ). Check with your Cadillac dealer.

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