Mercedes-Benz ML350 ECM-Power Relay 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

(426)

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

(426)

ECM-Power Relay Replacement Service

How much does a ECM-Power Relay Replacement cost?

On average, the cost for a Mercedes-Benz ML350 ECM-Power Relay Replacement is $114 with $19 for parts and $95 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
2013 Mercedes-Benz ML350V6-3.0L Turbo DieselService typeECM-Power Relay ReplacementEstimate$155.75Shop/Dealer Price$183.44 - $227.14
2003 Mercedes-Benz ML350V6-3.7LService typeECM-Power Relay ReplacementEstimate$133.35Shop/Dealer Price$160.47 - $202.39
2009 Mercedes-Benz ML350V6-3.5LService typeECM-Power Relay ReplacementEstimate$148.95Shop/Dealer Price$179.97 - $233.59
2010 Mercedes-Benz ML350V6-3.0L Turbo DieselService typeECM-Power Relay ReplacementEstimate$135.75Shop/Dealer Price$163.43 - $207.12
2006 Mercedes-Benz ML350V6-3.5LService typeECM-Power Relay ReplacementEstimate$148.95Shop/Dealer Price$180.00 - $233.64
2004 Mercedes-Benz ML350V6-3.7LService typeECM-Power Relay ReplacementEstimate$133.35Shop/Dealer Price$160.47 - $202.39
2005 Mercedes-Benz ML350V6-3.7LService typeECM-Power Relay ReplacementEstimate$138.35Shop/Dealer Price$165.23 - $206.97
2013 Mercedes-Benz ML350V6-3.5LService typeECM-Power Relay ReplacementEstimate$153.95Shop/Dealer Price$185.39 - $239.31
Show example Mercedes-Benz ML350 ECM-Power Relay Replacement prices

What is the ECM-Power Relay all about?

Vehicle development has evolved over the past several decades to a point where it seems every vehicle function is controlled by a computer, right down to the engine itself. This is actually the case for the engine and its related functions as it is controlled by the engine control module, or ECM. The ECM monitors and adjusts operation and power distribution to the fuel supply and injection systems, engine timing, exhaust gas recirculation, emissions, ignition system, and several other systems. In order to dispense power to operate these other systems, the engine control module requires power itself.

The power distribution center, or fuse block, located under the hood houses most or all of the vehicle’s fuses and relays. It contains a relay for the ECM that is powered up when the ignition key is turned to the on position. This ECM power relay acts as a switch that supplies power to the ECM. When the ignition is turned off, power switches inside the ECM relay and it no longer receives battery power. If the ECM power relay stops switching as it should, you will experience vehicle problems. When the relay is stuck open, no power will be delivered to the engine control module and the vehicle won’t start. If the relay is stuck closed, constant power will be sent to the ECM even with the engine turned off and the battery will drain.

Keep in mind:

  • The battery should be disconnected any time the electrical system is being serviced.
  • There are several problems which can cause your vehicle not to start, with the ECM power relay being one of them. Have the problem diagnosed by one of our expert technicians.

How it's done:

  • The ECM-power relay is verified that it needs to be replaced. The relay is located in the engine main fuse relay control box.

  • The defective ECM-power relay is removed from the control box by pulling it straight up and out of socket.

  • The new ECM-power relay is installed into the socket and the engine scanned for codes.

  • The engine is started and the ECM-power relay is tested for proper operation.

  • The vehicle is road tested for proper operation of the ECM-power relay and is then checked for codes.

Our recommendation:

The ECM power relay should last the lifetime of your vehicle unless there is a power distribution problem or moisture that causes it to fail. If your vehicle won’t start, have one of our expert technicians diagnose the problem and replace the ECM power relay if necessary.

What common symptoms indicate you may need to replace the ECM-Power Relay?

  • Engine will not start when the key is turned.
  • Engine doesn’t turn over when ignition is on.
  • Check Engine light is on.
  • Battery drain which may leave it weak or dead.

How important is this service?

Although it is extremely unlikely the ECM relay will cause your vehicle to stall or create a safety concern, your vehicle may not start or the battery may die while the ignition is off. In either case, you will need to replace the ECM relay.

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

(426)

Rating Summary
403
9
3
1
10
403
9
3
1
10

Juan

9 years of experience
338 reviews
Juan
9 years of experience
Mercedes-Benz ML350 V6-3.5L - Fog/Driving Light Bulb Replacement (Driver Side) - Lake Mary, Florida
Juan was in time and completed the repair on schedule .

Brian

23 years of experience
695 reviews
Brian
23 years of experience
Mercedes-Benz ML350 V6-3.5L - Oil Change - Jacksonville, Florida
Very polite and professional

Joseph

20 years of experience
652 reviews
Joseph
20 years of experience
Mercedes-Benz ML350 V6-3.5L - Battery - Salt Lake City, Utah
Joseph was punctual, despite having to pick up specially requested parts, gave the vehicle a thorough evaluation and replaced both the main battery and accessory batter in a total of 45 minutes. I was able to get important work done at home and didn't need to waste time at my local shop or the "stealer" -- super valuable! I would recommend Joseph with no reservations. I plan on using him again for future services.

Mike

13 years of experience
23 reviews
Mike
13 years of experience
Mercedes-Benz ML350 V6-3.0L Turbo Diesel - Battery - San Diego, California
Mike did an excellent job of replacing a Mercedes battery with a ver difficult installation. Mike explained the job and checked the vehicle’s electrics to make sure everything worked properly.

Excellent Rating

(426)

Rating Summary
403
9
3
1
10
403
9
3
1
10
Number of Mercedes-Benz ML350 services completed
4686+
services done by our mechanics
TOTAL NUMBER OF EXPERT Mercedes-Benz MECHANICS
1100+
experts on our platform

Recent articles & questions

How Long Does a Fuel Pump Usually Last?
Fuel pumps are a simple and rugged part of the fuel system. They are usually found inside of the fuel tank and are...
Is it Safe to Drive With a Donut Tire?
When one of your tires goes out, it is replaced with a donut tire (also called a spare tire, although...
How to Prepare for the Rhode Island Driver’s Written Test
A A big part of getting ready to drive is learning the rules of the road. Before you can take your road test, you need to have your permit. The only way to get a permit is to pass the...

Car sucking air.

You are correct in that a vacuum leak could cause a rough idle condition. However, your issue has many potential causes. I suggest having a trained mechanic with the correct diagnostic equipment pinpoint your problem. (https://www.yourmechanic.com/services/car-idle-is-rough-inspection)

Should I get rid of my car?

Transmissions are often repairable in the field, on or off the car. The cost of the repair will depend on exactly what has gone wrong with the transmission and so the best thing to do is get the issue properly...

My auto tran light and traction control light and engine light came on car shifts hard wont move also my dash lights for my drive reverse and such do not light up but car runs and has 91k miles

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