mercedes diagnostics


At John Haynes Mercedes, we offer a complete range of repairs and diagnostic services for all current Mercedes-Benz models. We’re Mercedes-Benz experts and enthusiasts, so you have the reassurance of knowing your car will be in capable, respectful hands.


Whether it’s a minor niggle or major issue, we have the skills, tools and facilities to put things right for you. Our repair work is carried out in our dedicated six-bay workshop by fully Mercedes-Benz trained technicians. We hold one of the largest stocks of genuine parts outside the UK main dealer network for current Mercedes-Benz models, making it easy for you to keep your car 100% Mercedes. 


Because they deal with all makes, non-franchise garages and big-name servicing and repair companies have generic, one-size-fits-all diagnostic equipment. Not us. We are a Mercedes Diagnostics specialist and have all the genuine Mercedes-Benz diagnostic equipment you’d find at a main dealership, so we can diagnose faults with complete accuracy and confidence.

Air Conditioning

All too often, people wait until their air-con actually stops blowing cold before having it looked at. As well as struggling to keep you cool, and demist windows in winter, malfunctioning air-con can make your the engine work harder and use more fuel. We can check, test, clean and recharge your car’s air-conditioning system, either as part of your regular servicing schedule or as a standalone job.

Panel Beater

Body Repairs

We have a dedicated body shop on a separate site, where we can carry out everything from light accident or cosmetic damage repairs to modifications and full panel replacements. Our workmanship to all models of Mercedes-Benz is of the very highest standard. We’re also happy to provide insurance estimates.


We can arrange an MOT for your Mercedes-Benz, whatever its age and model – click here to find out more.


Our dedicated workshops have all the facilities, equipment and expertise to keep your modern or classic Mercedes-Benz running perfectly.

Wheel Alignment

A simple check that can improve your car’s handling and fuel efficiency, and help your tyres and suspension wear evenly and last longer.

To find out more

please call us on 01903 500 000