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

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 Motorsports Ltd

5.0/5

At A1 Motorsports ltd, we pride ourselves in repairing vehicles to a satisfactory standard. Using our knowledge and diversity of skills, our services we offer range from Servicing too full engine rebuilds including timing chains and timing belts Based in Longfield/Dartford, with the necessary tools needed to repair a large variety of vehicles.

Chalk Croft Transport Yard, Longfield, Kent, DA28DX

Philip Lund Motor Engineers Ltd.

5.0/5

We specialise in car and motorcycle repairs, servicing and MOT testing. We are also an Independant Skoda specialist. Serving the village of Steeton and surrounding areas of Keighley, Silsden, Crosshills and Kildwick we have been providing reliable and honest work to our garage customers for over 20 years. From our fully equipped Garage conveniently located on the outskirts of Steeton we can offer a comprehensive service for your car from general annual services to Timing Belt checks, help with new or flat tyres and clutch repairs/replacements. Together we have decades of experience riding and repairing bikes and now we are offering that service to our customers in Steeton and the Aire Valley. The garage has a dedicated area for bikes with 3 ramps/lifts and a dedicated tool shop to allow us to perform your repairs or service at the standard you expect from Philip Lund mechanics.

Unit 1 Aireburn Garage, Keighley Road, Steeton, BD206RH

Millennium Garages Ltd - RAC Approved Garage

5.0/5

Millennium Garages is based in Southwark, London offering MOTs, Services and Car Repairs using industry-standard equipment and fully trained staff with over 40 years of experience in the motor industry. Since 2019, Millennium Garages Ltd has been a RAC Approved Garage. ALL Customers, Including RAC Warranties, are responsible for paying Congestion Charge and ULEZ when required for their vehicles.

Arches 43 - 47, Kings Bench Street, London, SE10QX

Ferdotti Motor Services Ltd

5.0/5

Ferdotti Motor Services is a reputable family owned business based in West Bromwich and have been established for over 30 years. As a local vehicle service centre we offer a wide range of services for cars and commercial vehicles including: MOT testing, servicing, repairs, diagnostics, laser wheel alignment, engine re-conditioning, welding and fabrication and bodywork. The quality of our work is reflected in our loyal customer base.

40 Pleasant Street, Lyng, West Bromwich, B70 7DP

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.