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

Wilsons Auto Service Centre

4.8/5

Why choose Wilson's? One stop car care shop Competitive prices Quality parts only Dealership service without the dealership prices Professional

Palmer Street, Jarrow, Newcastle Upon Tyne, NE323JJ

ROYAL CARS AUTOCENTRE LIMITED t/a AUTODOCS

5.0/5

Based in heart of Buckinghamshire in High Wycombe we are both AA and RAC approved garage, we provide the following: Bodywork Whether it’s a minor scratch or major collision damage, our skilled technicians can restore your vehicle’s bodywork to its original condition, using the latest techniques and equipment. Mechanical From routine maintenance to complex repairs, our experienced mechanics have the expertise to handle any issue your vehicle may encounter, keeping it running at its best. MOT Service We offer a full Class 4 & Class 7 MOT service, to make sure your vehicle meets the minimum requirements for driving on the road. Book your appointment now.

Unit 3, Abercromby Industrial Estate, Abercromby Avenue, High Wycombe, HP123BD

DS & Son Ltd

4.2/5

DS AUTO, is a family run business, based in Stretford and we cover all Manchester and the surrounding areas for Recovery, Breakdown and Garage service. We work alongside most of the insurance companies and will bet any quote, best price guaranteed. You can rest assure your vehicle is in safe hands. So give us a call

1 Wharfside Way, Trafford Park, Manchester, M171AW

Westwood Mot, Tyre & Service Centre Ltd

5.0/5

We are one of Thanet's most established independent vehicle service centres, aiming to provide a main dealer service at local garage prices. Our staff have many years experience at main dealer level, giving you the assurance and confidence that your vehicle is in very safe hands. Westwood Service Centre is owned and run by David Locke who has over 37 years of award winning experience within the Diagnosis/Repair/Service and Aftersales environment for customer delivery and satisfaction. David has used his years of expertise as an MOT tester, Master Technician, Technical Expert and Aftersales Manager and leads the team at Westwood Service Centre to the forefront as independent vehicle repair experts. His employees are trained to the highest standards and follow continual personal development plans that are tailored and reviews regularly in order to meet the needs of the ever changing innovations in vehicle technology. Our customers are an even mix of retail customers, national fleet contracts, emergency breakdown customers and warranty repairs. We can offer assurance about the quality of our work and are audited annually to the highest level by each of our commercial partners within the AA, RAC, DVLA and National Fleet companies. Our aim is to offer your a first class experience with a personal touch.

Unit 3-4 Goodwin Park, Westwood Industrial Estate, Margate, CT94HX

Kings Autos Ltd

5.0/5

I'm a NVQ level 3 fully qualified mechanic with 18 years experience. I specialize in Mazda vehicles as I worked for them for 15 years however I have worked with independent garages so I am proficient with all makes. We carry out all work from servicing to timing chains.

Kings Autos Ltd Unit 1 Phoenix Road, Lowestoft, NR337NP

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.