John Hamilton Diagnostics

John Hamilton Diagnostics North East UK based. Time served technician with a strong dealer background in Mercedes Software and

This is what sets us apart from the others. Fitting a factory supplied engine that gives 2 year dealer warranty. There...
21/05/2026

This is what sets us apart from the others. Fitting a factory supplied engine that gives 2 year dealer warranty. There is a difference.

Here at the garage it’s all about quality. For ages now we’ve used only the best oils we can find. Moving forward for...
14/05/2026

Here at the garage it’s all about quality. For ages now we’ve used only the best oils we can find. Moving forward for our car and van customers we are able to give you the choice of the oils we use to service your vehicles. We have Petronas oils in stock and now also have Mercedes branded oils available.

Did you know we do aircon servicing. We have both machines. Old and new type gas.
20/04/2026

Did you know we do aircon servicing. We have both machines. Old and new type gas.

One of today’s little missions was this fantastic 4x4 sprinter. It had recently had injector work done at another garag...
15/04/2026

One of today’s little missions was this fantastic 4x4 sprinter. It had recently had injector work done at another garage and kept getting a misfire. We were able to find the fault as burnt and worn pins in the injector plugs. We were able to source a complete top end loom, then solder in the repair wiring. There’s a reason why our customers travel to us. We aim to have your vehicle fixed first visit and out earning its keep.

As we get towards finishing the workshop we’re now able to get the bigger vans lifted on the new 5.5 ton van ramp. This...
15/04/2026

As we get towards finishing the workshop we’re now able to get the bigger vans lifted on the new 5.5 ton van ramp. This is a great addition to the garage and is proving its might lifting the biggest vans. If you have a big Merc van other garages are struggling to get in please get in touch.

Who else goes out of their way to get customers back on the road. Here we have a sprinter clutch being replaced on the ...
19/03/2026

Who else goes out of their way to get customers back on the road. Here we have a sprinter clutch being replaced on the back shift. The best time for van customers to get their vehicles fixed by dealer trained technician’s. When they sleep we work. This one has been collected after hours and will be returned at 6am in time ready to complete a days work.



23/02/2026

This is just a quick message for our customers who visit our site. When your at the security gate please call the number on the gate or our number and we will open it for you. This is an improvement to the site and allows us to keep your vehicles safe and secure while on site.
Thanks. John Hamilton
07946530920

Here’s a recent job we tackled. We were called out to a sprinter 907, 2020 that had no ignition lights and had been str...
26/01/2026

Here’s a recent job we tackled. We were called out to a sprinter 907, 2020 that had no ignition lights and had been stripped and misdiagnoses by another garage. On checking we were able to find the ignition module had fluids leak into it from a spillage on the dashboard.
We were able to quickly replace and rewire the main wiring plugs then supply and code a new ignition module to this van.
John Hamilton Diagnostics


Today’s jobs been a little different. We were delivered an ignition switch to repair. It was found that 2 others had ...
15/12/2025

Today’s jobs been a little different. We were delivered an ignition switch to repair. It was found that 2 others had tried to sort it. We harvested as much data as we could then made a switch to fit then traveled to install and code it. All this followed up with genuine entry online coding to make the job perfect.

Did you know we can offer a fully tailored servicing package for our customers, either at our workshop or at our custome...
28/09/2025

Did you know we can offer a fully tailored servicing package for our customers, either at our workshop or at our customers premises. We aim to make the whole experience seamless and at a time that best suits our customers requirements.
We only use genuine service parts and top spec Petronas oils.

Address

Chester Le Street
Chester-le-Street
DH23

Telephone

+447946530920

Website

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