mercedes diagnostics

LOOKING AFTER YOUR MERCEDES-benz – AND YOU

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.

Repairs

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. 

Mercedes-Benz technician carrying out workshop servicing on a vehicle raised on a lift.

Diagnostics

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.

Mercedes-Benz technician carefully inspecting and cleaning the exterior paintwork of a vehicle in a workshop.

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.

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navid alizadeh
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Another Job was done with John Haynes on my Sl320 (1998) a gearbox oil service, also they observed a fuel leak and resolved incredibly fast and they are the most knowledgeable Mercedes specialist I know so far! Thanks to David and Chris. Very grateful!
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Aimee Lister
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Great helpful service
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John McMillan
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Great service, reliable, they really know their cars and fair with prices.
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Jonathan K
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After finding John Haynes I simply would not take my car anywhere else now. Their knowledge and ability to diagnose and fix issues has been A1. Each time I get my car back it feels like a brand new car. Both Chris and David are super helpful in explaining the work needed and providing accurate quotes and estimates which come in on budget. Professional, honest and friendly team who offer a great customer service experience. Having taken my car in again recently due to a knocking from the suspension the issues were correctly diagnosed and fixed and the car drives like new again.
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Stephen
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Exceptional service
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Karen Adsett
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David was very helpful and they looked after our pet ambulance, very fast in fixing the problem with our 2018 c class estate. Definitely worth 5 stars, wish i could give 6 stars
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Simon Wright
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Their customers service is excellent
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Victor KJR
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I bought an R129 SL320 in 2001 - the car had been serviced by John Haynes for many years, so I decided to start using them for reasons of continuity (they’re around an hour from home). I sold that car in 2023, missed my R129 so ended up buying another one! Overall, across the 2 cars, I have used John Haynes on several occasions for servicing and repair work - each time, I have found their work to be of top quality - and a special mention for David Sandell, the Service Manager (a non workshop role as the interface between the customer and the technicians). David is very knowledgeable, extremely helpful and friendly. Very highly recommended. 5*

MOT

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

Servicing

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

Repair Enquiry

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Diagnostic Test

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Air Conditioning Top Up

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BODY REPAIR

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Enquiry

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Wheel Alignment

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