Shopping cart

Make Appointment
about_2 1 1 1
about_3 1 1 1
about_dots 1 1 1
About Us

Mercedes-Benz Specialists You Can Trust

We’re an independent, trusted Mercedes-Benz specialist based in Hertfordshire.

Every repair is carried out to manufacturer standard, using genuine parts sourced via the Mercedes-Benz Parts Portal, and diagnosed using Mercedes-Benz XENTRY Diagnostics with SCN Coding, the same equipment used by main dealers.

For cars under three years old, we also update your Digital Service Book, keeping your manufacturer warranty fully protected.

Screenshot_2026 07 24_210609 removebg preview

Specialist Expertise

Technicians who work on nothing but Mercedes-Benz, day in, day out.

Screenshot_2026 07 24_210549 removebg preview

Honest, Friendly Service

No jargon, no pressure, just clear advice and fair pricing.

12+

Years Experience

Get in Touch
Need a Repair Done Right?

Get your Mercedes running like new - Book in with the specialists who know it best.

Contact Us
Customer Feedback

What Our Customers Say

Testimonials

Excellent service from start to finish. The team were incredibly informative and walked me through everything in detail, leaving no questions unanswered. What really stood out was their honesty, instead of trying to fix things for the sake of it, they gave me realistic timelines for future work. For example, they advised that my front brake pads still had a few months left and recommended waiting until the warning light comes on so I get the most value out of them, which most garages wouldn’t do. First time using them and they’ll definitely be my go-to garage moving forward. Highly recommend!

Ant Guidi

Fantastic garage. Used many times, always great service. Most recently they put a lot of effort into resolving an awkward fuel/running problem on an old 190E which had been left sitting for a long time, most would have given up.

Grant

The Philip and Scott offer a fantastic service the genuine concern for their work is apparent when dealing with them I brought my 13 plate S63 to have some work done on it and they were brilliant I highly recommend bringing your vehicle here. The advice the care the pricing is all stellar. Thank you to the guys at Welwyn Merx, see you soon for my spark plugs lol.👌⭐⭐⭐⭐⭐

Giuseppe Molinaro

Chef Leader

I would like to say how delighted we have been with Phil over the past 8 years. .He is thoroughly professional and informative and nothing is too much trouble? I would highly recommend him and his staff to anyone who has a Mercedes.

Diana Crotty

Huge thanks to Philip and the team at Welwyn Merx, I trust these guys over the dealership. Their knowledge of Mercedes vehicles is excellent. I took my 2016 c250 in for a service, new discs and pads and also an MOT. Communication was great throughout and the price was very reasonable. Thanks again 👍

Dean Skippon

Took me car there for a repair and a replacement Nox sensor, causing the engine management light to come up, which Mercedes main dealer up the A1 wanted to do for £450, but Welwyn Merx assessed the fault though the car diagnostics, and was down to the Ad-Blue injector, so only Labour to clean it. I won’t be going back to Mercedes dealer for any work in the future.

David Wilson

Powered by
►
Necessary cookies enable essential site features like secure log-ins and consent preference adjustments. They do not store personal data.
None
►
Functional cookies support features like content sharing on social media, collecting feedback, and enabling third-party tools.
None
►
Analytical cookies track visitor interactions, providing insights on metrics like visitor count, bounce rate, and traffic sources.
None
►
Advertisement cookies deliver personalized ads based on your previous visits and analyze the effectiveness of ad campaigns.
None
Powered by