Book an Alternator Repair for your Mercedes

Trustpilot rating for all RAC Mobile Mechanics.

Why choose the RAC for an alternator repair?

With RAC Mobile Mechanics, you can avoid the hassle of taking your vehicle to a garage. They can do an alternator repair on your driveway, so you don't even need to leave the house.

All our alternators are OEM standards, that means we only use parts that meet your vehicle manufacturer’s strict quality criteria, ensuring top quality and reliability. With a 12-month guarantee, you can trust our replacement alternators to last. The price includes fitting – no hidden costs. Just friendly, honest experts.

RAC Mobile Mechanics can carry out alternator repair on popular Mercedes models such as A-Class, C-Class, GLC, E-Class, and EQA. This service is completed at your home or workplace, following Mercedes maintenance guidance and using OEM‑equivalent parts. You get clear pricing, real‑time updates and a convenient, no‑hassle experience.

Close up of an RAC Mobile Mechanic underneath a car

Our top pick for your Mercedes

We’ll come to you at home or work

RAC Mobile Mechanic

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At the RAC, we’ve got over 125 years’ experience in offering complete peace of mind® to our members. We’re best known for our breakdown service. And now – our new RAC Mobile Mechanics are here to help make every day motoring easier. If you need a service or repair, they’ll come to you at your home or work.

An RAC Mobile Mechanic using a diagnostic machine inspecting a car for an alternator repair.

Book an alternator repair

If your car’s battery keeps dying or electrical systems are acting up, it could be a faulty alternator. Your alternator should charge the battery properly, and if it doesn’t, you could need an alternator repair.

OEM quality parts

We use original equipment manufacturer (OEM) standard parts, which means every new part will be the same standard and same quality as the original part it replaced.

Mechanics you can trust

Our mobile mechanics are friendly, honest, and backed by the RAC.

Vehicle diagnostic check

£125

We’ll spend up to 30 mins checking your car’s onboard management system for faults. We’ll talk you through repairs needed and provide a full report. If any further work is needed, we’ll agree this with you before we start. Any additional work after the first 30 minutes will be priced at £20 per 15 minutes. We’ll agree this with you before proceeding.

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

Full error report and advice on repairs

If we detect any issues, we'll talk through what needs to be repaired. We’ll give you a no-obligation quote to fix it on the spot, if we can. Or we’ll recommend a local RAC Approved Garage, and give you a full error report to take there.

And it’s not just alternator repairs we can do for your Mercedes

Mobile mechanics bring the garage to you, saving you the hassle of getting your car to a garage. If you need a service or repair, they’ll come to you at your home or work.

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

Auto-Line MOT Centre

5.0/5

Here at Auto-Line M O T we offer high quality servicing and mechanical repairs. We carry out any repairs to industry standard service manual labor times. We also offer a free collection and delivery service and vehicle movement services, which are subject to availability. We are a small close-knit team of two technicians with over 30 years of experience between us. We have a real passion for what we do and carry out every single job, no matter how big or small, to the highest standards. Owner Oliver is fully licensed, insured and qualified in the following; DVSA registered Authorised Examiner and mot tester Automotive Refrigerant Handling (EC Level 3 Award (IMI Awards Ltd) Light Vehicle Maintenance and Repair Competence, Level 3 Diploma (IMI Awards Ltd) Light Vehicle Maintenance and Repair Principles, Level 2 Diploma (IMI Awards Ltd). Numerous product courses with Ford Numerous product course with jaguar land rover Numerous product courses with BMW Luke is a landrover master technician Very experienced with all makes and models as comes from and aftermarket background. Light Vehicle Maintenance and Repair Competence, Level 3 Diploma (IMI Awards Ltd)

Unit 17 British Waterways Yard, Shardlow, Derby, DE722HL

Bismillah Garage Services Ltd

4.2/5

Bismillah Garage Services is a family business, well established and respected MOT & car service garage in Luton also supplying replacement automotive parts such as exhausts, brakes spark plugs, oil filters and tyres. We undertake car servicing and repairs that including computer diagnostics, brakes, clutches etc. Regular car servicing can extend the life of a vehicle considerably and can save money. We focus on providing an exceptional garage service with competitive pricing. We have been serving customers in the Luton for 15 years. We have an up-to-date, fully equipped test centre, with all the facilities to service and repair your vehicles. We have built a solid reputation in Luton for delivering high quality garage services tailor made to meet the needs of our clients. Much of our business comes from word of mouth and satisfied repeat customers.

2A Tudor Road, Luton, LU3 1RN

GJB Autos

4.2/5

Welcome to GJB Autos, we are a garage conveniently located on Littlestone Road New Romney. We serve the local community of the Romney Marsh and surrounding areas. We are proud to have been established since 1975, in North Street New Romney and moving to our current premises in Littlestone Road in 2015. GJB Autos have built a great reputation providing a professional and friendly service to all our customers. It’s important to regularly maintain and check your car, not only for your safety and the safety of drivers around you but it will also help to sell your car in the future with a comprehensive service history. GJB Autos offer a comprehensive range of services at our service center including engine diagnostics, servicing, brakes, tyres, air conditioning, ECU remapping and much more. With many years experience in the industry, we can carry out servicing on all makes and models of vehicle. GJB Autos is a VOSA approved MOT testing centre for class 1,2, and 4 and a registered member of the GoodGarageScheme.com RMI, Autofirst Network, RAC Approved/Accredited, we guarantee quality and efficient work at reasonable prices every time.

8 Littlestone Road, New Romney, Romney Marsh, TN288PL

Kissane and Jeffries (Recovery Services) Ltd

5.0/5

Kissane and Jeffries are a well established rescue and recovery company operating in the West Midlands and have been in the trade for over 30 years with proven ability to carry out a professional and competent service. We are constantly upgrading our fleet of breakdown and recovery vehicles and equipment to keep up with today's demands for the best in the business to ensure we can serve you as quickly as possible when needed. We also have comprehensive vehicle repair facilities available for most makes and models with very competitive pricing structures and a quality of service that will make you want to use us again and again, our technicians are ATA accredited and our workshops are registered to the BSi PAS 80 Standard. Customer satisfaction is our priority and we are focused on delivering a quality service whether it be as a one off job for an individual customer or one of the many jobs we carry out some of our blue chip clients, each and every customer is treated with the same high level of care, this is demonstrated with our commitment to the standards of ISO 9001 and PAS43.

Station Road, Rowley Regis, Warley, B65 0JY

Eastlake Garage

4.7/5

We are a well-established company with two sites in the local area, which have been in operation since 1999. We are AA, RAC and GREEN FLAG certified and are able carry out their breakdown and repair work and warranty work, as well as being Trading Standards approved and members of the Motor Ombudsman adhering to their strict code of conduct at all times. We are also Afilliated with the IMI We can offer our customers a free vehicle collection and delivery service within 10 miles of the garages, and we also offer discounts to NHS and Emergency Service staff members upon valid photographic identification.

Gaens Quarry, Porthcawl Road, South Cornelly , Bridgend, CF334RN

Frequently asked questions about car alternator

Can I drive my car with a bad alternator?

Driving with a bad alternator isn't a good idea. A failing alternator can make the battery drain fast, leading to a breakdown. Electrical parts may also stop working, which can be unsafe. It’s best to get the alternator checked and fixed or replaced as soon as you can.

What happens when the alternator stops working?

When the alternator fails, the battery won't charge and will drain. This can make the car stall and prevent it from starting. Electrical parts like lights, radio, and power windows may stop working. Get help from a mechanic right away to avoid more damage.

What is alternator reconditioning?

Alternator reconditioning means fixing an old alternator by replacing worn-out parts. This can be cheaper than buying a new one, but it may not last as long as a new alternator.

How much does an alternator cost?

The cost of an alternator varies by the type of car and the quality of the alternator. To know exactly how much, you should talk to your local mechanic.

Can an alternator be repaired?

Yes, alternators can be repaired if the damage isn't too bad. If the alternator is very damaged, it may be better to replace it.

Is it worth replacing an alternator?

Replacing an alternator is often worth it if the alternator is old or very damaged. A new or rebuilt alternator can work better and prevent future problems. Talk to a mechanic to help make the best choice.

How often should an alternator be replaced?

Alternators usually last between 80,000 and 150,000 miles. But it can vary based on where and how you drive, and maintenance. Regular check-ups and fixing problems early can help it last longer.

Does an alternator repair or replacement fall under warranty?

Some alternator repairs or replacements may be covered under the car’s warranty, especially if the car is still new. Check your warranty details or talk to your mechanic to see if it's covered.

Is an alternator repair or replacement covered by insurance?

They’re often not covered by standard car insurance policies because they're thought to be part of your vehicle's upkeep. But, if it's damaged in an accident, it might be covered.

When do I need an alternator replacement?

You need an alternator replacement when it's very damaged or has worn-out parts that can't be fixed. If it's not keeping the battery charged or causes electrical issues, you'll need to replace it.