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

Heath Mill Garage

5.0/5

A real alternative to the Main Dealers offering Servicing, Tyres, Exhausts, 4 Wheel Alignment, Air Con and much more. Conveniently located on Heath Mill Road, Wombourne, close to Sainsbury's we offer a full range of facilities with a reception and waiting room, we also have courtesy cars available. We use top quality parts such as Brembo Braking and Shell Oils to ensure your vehicle is running at it's best. We also update Electronic Service Records for modern vehicles without a service book.

Heath Mill Road, Wombourne, Wolverhampton, WV58AP

Bodywyse Autocare Ltd.

5.0/5

.“Bodywyse Autocare Cupar Ltd is a one stop shop for all of your motoring needs. We offer a full range of services including Servicing, MOTs, Tyres, Brakes, 4 Wheel Alignment, Air Con and of course Accident Repair, along with any mechanical work you might need for cars and commercial vehicles. We are an insurance approved body shop, partnered with PSA’s own Eurorepar Car Service network and regulated by the Independent Garage Association. This means that we can offer a manufacturer level of service at a very competitive price whatever you might need. We offer fixed price servicing and all work is guaranteed, insuring a high standard of quality. We pride ourselves on our customer service and any of our staff will be happy to assist in helping with any requests you may have. Give us a call for all your vehicle needs.”

Prestonhall Industrial Estate, Cupar, Fife, KY154RD

Keep Driving Auto Ltd

4.9/5

Here at Keep Driving Auto we provide a first rate, friendly garage service. Serving the Swansea area, located in Llansamlet within easy reach of both the city Centre and Swansea Enterprise Park.

Unit 7 St Lukes Court, Clarke Way Swansea Enterprise Park, Llansamlet, Swansea, SA17ER

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

CSS Motors

4.4/5

CSS Motors offers car repairs in Waltham Abbey and further afield, such as Loughton, Waltham Cross, Theydon Bois, Buckhurst Hill and beyond. Our team has over 125 years experience in the motor trade and prides itself on customer service and retention. What you will get from us is transparent pricing, a tailored personal service, as well as vehicle collection and delivery, their is also the optional use of a courtesy car if required. Since our inception, we have grown with our customers, offering new techniques and services in response to their needs. Within our service, we cover all makes and models from classic cars to modern cars and commercial vehicles. We are a full MOT test centre supporting class 4, 5A and 7 vehicles which include 3 wheeled bikes, quads, cars, passenger vehicles, taxis, motor homes, ambulances, goods vehicles and also vehicles over 3000kg up to 3500kg gross weight. We can carry out your MOT testing up to one month before the expiry of your current MOT and we can also service your car on-site, so please do consider booking this at the same time. We quote you the cost of your servicing before it begins, so you are fully aware and there are no hidden fees. We also have the latest diagnostic testing equipment and guarantee quality parts and labour from our friendly, professional and fully trained team. We can also service and re-gas your air conditioning system, just ask! We look forward to giving you a warm welcome - and make sure to take a look at our latest.

148 Brooker Road, Waltham Abbey, EN9 1JH

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.