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The name 'MERLIN' has been associated with diesel fuel injection test equipment since 1947, when it was manufactured by engineers C.T. Rhodes of Halifax, West Yorkshire, and later, in the early 1960's, Merlin International and In 2001 Merlin Diesel Systems was born.

Since 1991 when the company was purchased by Ken Bramley (Chairman) and Jonathon Chaytor (Financial Director) the company has evolved supplying not only Test Equipment but OE Spares, Tooling and Filters the site is also host to new generation Workshops and Vehicle Diagnostic Centre. Merlin headquarters are now located in a purpose built 5,110 sq. M facility in Preston, Lancashire employing over 70 people and distributing Merlin products in over 100 countries.

Our mission statement is simply to deliver quality products with excellent technical support in an efficient way and build strong ties with our customers and suppliers. Creating a profitable business model where people enjoy working and where customers enjoy dealing with us.

Diesel Parts

The parts division specialise in the sale of diesel injection spare parts we also carry a wide range of starters and alternators and vehicle electronics.


Fuel Pumps/Injectors

We carry a large scope of exchange and outright pumps and injectors all repaired to OE spec or brand new. From old Rotary and Inline pumps right through to the very latest in Common Rail.


The filter division is well stocked with Oil, Fuel, Air and Hydraulic filters for automotive commercial and plant applications from the following manufactures: MANN, COOPERS, FRAM, KNECHT, CROSLAND, HENGST, FLEETGAURD, DONALDSON, and BALDWIN

Workshop/Vehicle Care

To back up our fuel pump and injector exchange programme we have invested heavily in systems, technology and training making sure we have the workforce and machinery capable of repairing tomorrow’s technology today. We offer a collection service for customers who require estimates on fuel injection repairs. And our vehicle care centre is there to look after the local market carrying out anything from a regular service to sophisticated diagnosis and repairs

ECU Remapping Service

If you are tired of rising fuel prices or want to improve the performance of your vehicle Merlin can offer a tailor made package to suit whether is automotive, commercial or agricultural. You can also become part of the team and get the franchise package from Merlin an ideal add on to your business.

Diagnostic Equipment and Tools

We can supply from a large range of Diagnostic equipment and tools to suit your needs whether it’s in depth diagnostics or specialist tools for recalibrating common rail systems.

Test Equipment

The product range includes injector and pump test and service equipment for automotive, light and heavy commercial, plant, industrial, rail and marine also a selection of accessories from camboxes, pump mounting brackets, mobile calibrating rigs, ultra sonic tanks to test injectors, test pipes and tool kits

In addition to the standard range of equipment Merlin offer a bespoke service particularly useful for our O.E.M and heavy duty customers. As well as manufacturing new equipment, Merlin always have a comprehensive selection of used equipment which can either be bought as seen or as a refurbished unit carrying six months warranty.

Latest News

Motortec Automechanika Madrid

 We are exhibiting this week at Motortec Automechanika Madrid.  You will find us in Hall 3, D03

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Posted On: 2017-03-15 11:39:11

Motortec Automechanika Madrid

 We are exhibiting this week at Mortec Automechanika Madrid.  You will find us in Hall 3, D03

Read More

Posted On: 2017-03-15 11:38:58

Motortec Automechanika Madrid

Posted On: 2017-03-15 11:38:11


Please take a look at our newsletter for 2017

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Posted On: 2017-03-10 10:40:37


We will be exhibiting at Automechanika New Delhi this year - PRAGATI MAIDAN - 21st-24th March. You will find us in Hall 12, ... Read More

Posted On: 2017-02-28 12:02:27

Tradeshows 2017

We will be exhibiting at all the major tradeshows again this year.  Please take note of the dates and hope to s... Read More

Posted On: 2017-01-31 13:50:54

Thanks for your support!

We are proud to work with our friends in Estonia, STARDEX OY LTD, thanks for your support!

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Posted On: 2017-01-23 11:10:51

Happy New Year

Happy New Year to all of our customers.  We hope you have a happy, healthy & prosperus 2017

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Posted On: 2017-01-04 14:37:06


Our stand at Automechanika Frankfurt 2016

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Posted On: 2016-10-04 10:39:01

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