Book an ECU Repair for your Mercedes| RAC

Why choose the RAC for an ECU repair?

At the RAC, we've got over 125 years' experience helping UK drivers. We have the skills and knowledge to keep your vehicle running. We'll give you results you can rely on at a price you can afford.

Close up of an RAC Mobile Mechanic underneath a car

Book an ECU repair

The Engine Control Unit (ECU) is the brain of your vehicle and works to keep it running smoothly. If it's acting up, it can mean poor performance, increased fuel consumption, or trouble starting your car.

Quality work

Any work done will meet the high standards set by the RAC.

Exceptional customer service

We’re friendly, straightforward and jargon-free

A mechanic inspecting the underside of a vehicle.

Book a diagnostic

A mechanic will check your car for faults and talk you through any repairs you might need. There are various ways to check for faults, which could include a physical examination or plugging in to check your car’s onboard engine management system.

Diagnostic check

We’ll look for any mechanical or electrical problems. If we need to, we’ll also check your car’s onboard engine management system. Depending on your car and issue, this will usually include: – Engine – Power steering – Brakes – Transmission – Exhaust system – Fuel injection system – Cooling system and air flow – Sensors

And it’s not just ECU repairs that we do for Mercedes

RAC Approved Garages offer MOTs and services. Our professional mechanics have the expertise and experience to make sure your vehicle is operating safely and efficiently – results you can rely on at a price you can afford.

A close up of an RAC mobile mechanic looking under the hood of a car

Try one of our RAC Approved Garages

View all garages

Performance 3000 RAC Yeovil

4.8/5

Performance 3000 are the RAC approved garage for Yeovil and the surrounding areas in Somerset. • We use Bosch KTS (some of the most advanced equipment in the world) as our primary source of diagnostic equipment. • We only fit genuine Bosch or original specification equipment • We work to approved and audited codes of practice • Our Code of Practice is approved by the Trading Standards Institute • Our technicians are comprehensively trained by Bosch • We only ever carry out work with your permission • We provide a quotation before we start any work • We keep your old parts so that you can see that the work was necessary • We use industry approved times when calculating how much labour to charge so that you know the price you pay is fair • Our technicians are comprehensively trained and document every procedure. • We are able to assist with the collection and return of vehicles, wherever possible We offer services which other garages and main dealers are unable to: • Our in-house rolling road enables us to diagnose and test vehicles in our workshop just as if they were driving along a road • We hand-make stainless steel exhaust systems on your car whilst you wait • Our in-house machine shop allows us to fabricate various items on-site

40 Buckland Road, Pen Mill Trading Estate, Yeovil, BA21 5HA

A1 Tyres and Exhausts

5.0/5

With over 30 years experience of automotive repairs in Coventry, A1 Tyres and Exhausts is a name that you can rely on to deliver a professional, high quality, and reliable service, that will meet all of your car needs. And above all, we are a name you can trust again and again.

Unit 12-13, Relton Mews, Coventry, CV65HE

ALEXANDRA AUTO REPAIRS LIMITED

4.3/5

At our garage in Wood Green, we bring a lifelong passion for cars and unmatched expertise to every vehicle we service. With years of dealership experience, including specialising in Mercedes, we are fully qualified and up to date with the latest automotive knowledge and technology. Whether you need an MOT, servicing, car repairs, tyres, or brakes, we’re here to keep your car running smoothly and safely. Book online today or get in touch with us to learn more. MOTs: Ensure your vehicle meets all safety and environmental standards with our thorough MOT testing. Servicing: From routine maintenance to comprehensive servicing, we keep your car running smoothly. Car Repairs: Whether it’s minor fixes or major repairs, we’re here to help. Tyres and Brakes: Offering a wide range of tyres and expert brake services for your safety on the road. Diagnostic and Alignment Technology: We use advanced diagnostic tools and wheel alignment systems to deliver precision and efficiency.

13 Bedford Road, N22 7Au, London, N227AU

Diplock Fuel Injection Services Ltd

5.0/5

We at Diplock Fuel Injection Services Ltd are a professional and friendly company based in Hailsham. Established since 1985, with individuals having over 50 years experience our car mechanics offer an array of car maintenance services. We specialise in diesel fuel injection and MOT testing, and can offer a comprehensive selection of repair work. We have built up a highly sought-after reputation and we come highly recommended by people in the trade. We also pride ourselves on offering very good rates on MOT tests; so please contact us for an unbeatable price!

Unit 3/4 Avocet Way, Diplocks Way, Hailsham, BN27 3JF

CHALLENGER BEESTON

4.7/5

Challenger Autos is a long established family run garage based in Beeston, Nottingham with over 30 years’ experience. Our specialist team of mechanics provide a personal and friendly service and are dedicated to providing our customers with the highest quality of car care. We offer all our customers an extremely high level of service at cost effective prices. We pride ourselves on building strong customer relationships, which has enabled us to achieve an exceptional reputation in the Nottingham / Derby area. We believe that our customers needs are of the utmost importance. Our entire team is committed to meeting those needs.

8 Factory Lane, Beeston, Nottingham, NG94AA

Frequently asked questions about ECU repairs

Can my damaged ECU be repaired?

Yes, a damaged ECU can often be repaired. Whether it can be depends on the amount of damage and how easy it is to find replacement parts.

Can I fix the ECU myself?

It's usually best to leave ECU repairs to the experts. This is because as they require special tools and knowledge of car electronics.

What are the signs of a failing ECU?

Look out for a check engine light being on, the engine stalling or misfiring, poor fuel economy and difficulty starting the car.

How long will my ECU repair take?

It can take anywhere from a few hours to a couple of days. This depends on the issue and how available the parts are.

Is my ECU repair covered by car insurance?

ECU repairs may be covered if the damage is caused by something that is insurable, like an accident. Talk to your insurance provider to find out more.