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.
Key Programming and Codes for Mercedes vehicles requires specialist tools and workshop facilities, so this work is completed through the RAC Approved Garage Network. Our approved garages service models such as A-Class, C-Class, GLC, E-Class, and EQA, following manufacturer procedures, certified equipment standards and rigorous quality checks. You receive transparent pricing, progress updates and RAC‑backed guarantees.
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.
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.
Try one of our RAC Approved Garages
Kerr Tech Automotive ltd
Edward Street Garage Crewe Limited
Wimbledon Car Care
Dino Motor Company Limited
Vehicle Solutions Sheffield Ltd
Frequently asked questions about key programming and codes
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.
- 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.
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.
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.
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.
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.
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.
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.
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.
Prevent key fob issues by avoiding moisture exposure, replacing the battery regularly, and handling your key with care.
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.
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