Book a Glow Plugs Repair for your Mercedes

Trustpilot rating for all RAC Mobile Mechanics.

Why choose the RAC for a glow plug 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.

Plus, with RAC Mobile Mechanics, you can avoid the hassle of taking your vehicle to a garage when you need a repair. We’ll come to you, at your home or work.

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 for your Mercedes

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.

A customer tending to her garage with an RAC Mobile Mechanic in the background

Book a glow plugs repair

If your diesel engine is having trouble starting, especially in cold weather, it could be faulty glow plugs. Our mobile mechanics can come to you at home or work to replace defective parts, all without the hassle of getting to a garage!

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

£99

For a limited time, get £50 off repairs over £150 when you book a diagnostic test. Offer ends 09/12/25, 09:00.^**
Our mobile mechanics will spend up to 30 minutes checking your car for faults and talk you through any repairs you might need and give you a report for your records.

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 glow plug repairs that 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

All Trans Autos Ltd, Bosch Car Service

5.0/5

All Trans Autos was started in August 1980 by Jill and Richard. We employed our first member of staff, Tony, in 1984 and we are proud that he is still in our employment. Over the past 34 years All Trans Autos has grown and today has 15 employees, ranging from fully qualified technicians to part time office staff. Each one is a valued member of the team and provides the excellent customer service for which the company is renowned. All Trans Autos prides itself on its fantastic training program. Even after 25 years Tony is still attending training to keep up to speed with the fast moving technology in today’s cars. We have trained four apprentices over the period and currently have our fifth apprentice who is in his first year of training. The husband and wife team of Jill and Richard provides an excellent atmosphere. They work along side their staff, giving the garage that family feel. Their children all help within the company, inputting their skills where required, although only one of them works full time, as the company’s fleet manager. In 2006 All Trans Autos moved to its present location – the same year in which we became a Bosch Car Service centre. In order to become a BCS certain criteria have to be met. To read more about this see our Bosch page. Today All Trans Autos is one of the largest independent garages in Colchester. We offer unlimited expertise and are able to deal with most makes to dealer level. We operate to standards beyond those that are expected even by Bosch, and we won their quality award in our first year. We were shortlisted down to the last three in the Independent Garage of the Year Award in 2008.

Unit 7 Moss Road, Stanway, Colchester, CO30LE

LM Motor Clinic - Kilbirnie

5.0/5

With over 20 years motor trade experience, 2020 saw the establishment of LM Motor Clinic. A business driven by customer service. The ethos at the heart of LM Motor Clinic was to deliver an excellent customer service experience to all customers. We are North Ayrshires only Rac approved Garage. We are also Ayrshires only Castrol service we ensure we use the correct oil for your vehicle. Call us today to book your next service.

30 Holmhead, Kilbirnie, KA256BP

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

Car M.D. (Mossley) LTD

4.8/5

Car M.D. (Mossley) LTD in Mossley.

Car M.D (Mossley) Ltd, Mossley, OL59BG

Rowledge Garage

5.0/5

sed in Rowledge Surrey, Rowledge Garage provides a quality, reliable motor engineering service covering all garage operations from MOTs to car servicing and auto diagnostics. The garage offers free vehicle pick up and drop off to customers for your convenience, plus competitive pricing with a personal service.

5 The Square, Rowledge, Farnham, GU104AA

Frequently asked questions on glow plug repair

What does my glow plug do?

A glow plug heats the air in a diesel engine to help it start, especially in cold weather.

What happens when my glow plug fails?

When a glow plug fails, your engine might be hard to start, producing more smoke, engine misfires, and poorer performance.

Can I drive with a bad glow plug?

You can, but it’s not a good idea. It can lead to poor engine performance, increased emissions, and overall damage.

How often should I replace my glow plugs?

Glow plugs typically last between 60,000 to 100,000 miles. Read your car’s manual and have them checked regularly.

Can I replace glow plugs myself?

It’s tricky and needs specific tools, so it’s best to let a mechanic handle it.

Why should I replace faulty glow plugs?

Replacing faulty glow plugs can improve engine start-up, reduce emissions, save fuel, and prevent engine damage.

Are my glow plugs covered by warranty?

It depends on your car’s warranty terms. They’re often not covered since they’re a wear-and-tear item, check with your warranty provider.

Is glow plug replacement necessary for all diesel engines?

Yes, all diesel engines use glow plugs for starting, especially in cold weather. Regular maintenance and replacements are vital for the best performance.