Marx-Performance GmbH

Marx-Performance GmbH is a specialist workshop in Menden (Sauerland) focused on software tuning, motor and chassis technology, aerodynamics and retrofit conversions for BMW and MINI. The company runs an online shop, offers a remote workshop service and lists clear contact details and opening times on its site.

The team provides service, maintenance and bespoke performance upgrades alongside parts and accessories sold through their e‑commerce store. Appointments and technical enquiries are handled via phone or email listed on the official site.

A practical, workshop-focused experience for owners seeking ECU/software tuning, suspension or retrofit work on BMW and MINI models.

Look out for:

• ECU and software optimization services and bespoke performance tuning.

• Chassis and Fahrwerkstechnik work, plus aerodynamic and retrofit solutions.

• An online shop with branded accessories and replacement parts.

• A remote/“Remote‑Werkstatt” service for diagnostics or support.

Best way to experience it: Contact the workshop by phone or email to describe your car and goals, confirm available appointment times (weekday hours are published on their site), and ask which parts or diagnostics are needed before visiting.

• Located at Iserlohner Landstraße 21, Menden (Sauerland).

• Phone and bookings: +49 2373 913 9001; email: kontakt@marx-performance.de.

• Published opening/appointment hours are listed on the official site; confirm before visiting.

• Offers remote diagnostic/support services and sells parts through its online shop.