Book Key Programming and Codes for your Mercedes

Why choose the RAC for key programming and codes?

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 a key programming and coding service

Lost or damaged keys? Our RAC Approved Garages can offer fast and reliable key programming and coding services.

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 key programming and codes that we can do for your 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

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

MK MOT & Service Centre

4.8/5

We are a local independent garage offering our customers all forms of mechanical repairs, servicing and MOT's. Business partners Mark and Craig have over 50 years' experience working on all makes and models of vehicles, with no job being too big or too small. We are members of the Institute of the Motor Industry (IMI) which should offer you peace of mind that we take great pride in our work as it ensures we remain up to date with all courses and techniques. We work out of a large workshop which has 4 ramps, including an MOT bay, and we have a large comfortable waiting area available for your use should you like to wait whilst we work on your car.

36 Barton Road, Eaton Ind Est, Milton Keynes, MK23LQ

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

RSC Ltd.

4.5/5

We have on site a fully equipped three ramp workshop. Our work shop philosophy is very old school, we will never carry out any work to your vehicle unless it is needed, always ask your permission to carry out any work up and above what has been agreed and do our utmost to give a fair and reasonable cost service at all times. As a result of this we have a loyal database of customers from Rickmansworth, Watford, Northwood, Hatch end, Bushy and surrounding area. We offer a wide variety of services at an extremely competitive rate especially when compared to the main dealers, these include: servicing, repairs, bodywork, tracking, tyres, air conditioning re gasses, clutches, brakes, exhausts, car audio and alarms.

Oxhey Drive, South Oxhey, Watford, WD197SE

Reliance Auto Test Bicester

4.3/5

Reliance Auto Test has been in business for many years, branching out to our Bicester branch providing a one stop shop for all your Car & Van requirements. We have served local residents of Bicester and surrounding areas with a friendly, high quality service that has kept us in business. All our staff are fully qualified vehicle technicians and we are fully insured. Many of our customers come back year after year enjoying a service that is personal and great value. We are open for business 5 days a week, Monday to Thursday 8.00am - 6 pm, Friday 8.00am - 5pm and Saturdays By appointment only “Honesty is our best policy.

Unit 16, Wedgewood Road, Bicester, OX26 4UL

Frequently asked questions about key programming and codes

Can you program a car key yourself?

Yes, some car keys can be programmed at home using the vehicle's manual instructions. However, this is generally limited to basic key fobs and older models. For most modern cars, you’ll need to take it to a professional.

How do I reprogram a car key at home?

If your key can be reprogrammed at home, follow the instructions set out in your vehicle’s manual. If you don’t have access to this, you could try the general advice outlined below.
Insert the key into the ignition and turn it to the 'On' position without starting the engine.
Leave the key in this position for about 10 minutes, then turn it to the 'Off' position.
Repeat this two more times.
Turn the key to the 'On' position one last time, and it should be programmed.

What should I do if my key fob stops working?

First, check the battery and replace it if necessary. If the key fob still doesn't work, it may need reprogramming. Contact a professional locksmith or your dealership for help.

Can a locksmith reprogram my car key?

Yes, many professional locksmiths offer car key programming services. You’ll often find this is a more cost effective option that going to your dealership.

How long does it take to reprogram a car key?

Typically it takes between 30 minutes to an hour to reprogram a car key. This may vary depending on your car’s make and model.

Is reprogramming covered under warranty?

Car key reprogramming may be covered under your vehicle's warranty, but it depends on the terms and conditions. Check with your warranty policy for specific details.

Can reprogramming fix a damaged key fob?

Reprogramming can fix software-related issues with the key fob, but it won't repair physical damage. If the key fob is damaged, you may need to replace it entirely.

What are the benefits of reprogramming a car key?

Reprogramming a car key makes sure that only authorised keys can start the vehicle. It can also resolve some of the issues attached to lost or damaged keys, giving you peace of mind and convenience.

Is it possible to reprogram a used car key?

Reprogramming a used car key is possible depending on the make and model of your vehicle. Check your vehicle's manual or consult with a professional to find out if it’s possible for your car.

How can I prevent key fob issues in the future?

Prevent key fob issues by avoiding moisture exposure, replacing the battery regularly, and handling your key with care.

Can all cars have their keys reprogrammed?

Most modern cars with electronic key fobs or transponder keys can have their keys reprogrammed. However, older vehicles with traditional keys may not have this feature.