Imperfection Free

Success is no accident. It is hard work, perseverance, learning, sacrifice and most of all, love of what you are doing
General Servicing

Welwyn Merx is THE leading independent specialist Mercedes-Benz vehicle servicing. With the latest in computer-based diagnostic equipment and access to the most up-to-date technical workshop information.

M.O.T Testing

Our MOT's are carried out independently off site by appointment only.


Welwyn Merx boast a wide range of up to date diagnostic equipment, including dealership level diagnostic machines. If you have any problems with your car that may require diagnostic services please give us a call

Air Conditioning

Did you know that continuous use actually helps to keep your Mercedes-Benz air conditioning system working more efficiently. However your Mercedes air conditioning service schedule should be maintained periodically as with any other vital Mercedes-Benz component.

Electrical Fault Finding

As technology is playing more of a big part in today's motoring, fault finding and fixing the fault your vehicle might be showing requires high level technical equipment and highly skilled technicians. At Welwyn Merx we have both and therefore able to provide engine fault diagnostics to all our customers.

Mech. Fault Finding

When it comes to Mercedes repairs of mechanical parts like brake pads and discs, a specialised mechanic is required. Welwyn Merx are experienced and highly qualified Mercedes-Benz service specialists. We only use original Mercedes Parts for repairs, guaranteeing the highest levels of quality and performance.

and we love.....

where we leave the competition standing


Customer Satisfaction


Price & Quality


On Time Delivery

who we are

Welwyn Merx Limited is a family run business with genuine passion and dedication for Mercedes-Benz passenger cars. With over 25 years experience we are THE Independent Mercedes-Benz Specialist with a personal and friendly approach to our customers.


With our Mercedes-Benz experience we offer our customers a service which supersedes the levels at local dealerships and other Independents. Our aim is to become THE most respected Mercedes-Benz Independent Specialist in Hertfordshire and North London. We are a young company, but we have traditional values when it comes to looking after our customers.


We have ability and diversity among ourselves and are a forward thinking company with good morals and integrity. Most of all we treat people how we ourselves would like to be treated. Welwyn Merx Limited offer servicing, diagnosis and repairs using genuine parts and accessories at a price which is affordable compared to the Mercedes-Benz dealer network

Career Milestones

Mercedes-Benz Cars Worked On

Weeks Working On Mercedes-Benz

Repeat Customers

contact us

Sometimes magic is just someone spending more time on something than anyone else might reasonably expect. Here at Welwyn Merx......the magic happens.

Does your Mercedes-Benz
need a service?

Welwyn Merx Limited,
6 Garden Court Business Centre
Tewin Road, Welwyn Garden City,
Hertfordshire AL7 1BH


No STAR on the front? Sorry but we are 100% dedicated to Mercedes-Benz

Mercedes-Benz specialist