Mobile ECU Remapping & Gearbox Tuning in North Somerset & South Wales


MTechTuning provides professional mobile ECU remapping, gearbox tuning and vehicle performance services across North Somerset, South Wales and the surrounding areas. We specialise in BMW vehicles but also cover a wide range of other manufacturers, including Audi, VW and performance petrol and diesel models, delivering reliable and safe tuning using dealer-level diagnostics.


At MTechTuning, we are your trusted partner in maximising your vehicle’s performance and efficiency through professional remapping. Based in North Somerset and South Wales, and covering areas including Bristol, Weston-super-Mare, Chepstow, Cardiff and Newport, we offer a wide range of specialised services including mobile remapping, ECU Remapping, Gearbox Remapping, diagnostic health checks and performance solutions such as DPF, EGR, AdBlue and decat options.


We also provide a wide range of additional performance options, which you can view via our services pages. We work closely with NeosBeemers, making us a go-to destination for BMW performance hardware installations and exhaust modifications.


Serving North Somerset and South Wales, our experienced team is dedicated to unlocking the true potential of your vehicle while maintaining reliability, drivability and long-term engine safety, ensuring an improved and more responsive driving experience every time you get behind the wheel.

Mobile Remapping

We can come to you wherever you are in North Somerset or South Wales for ultimate performance and convenience!

ECU and Gearbox Remaps

We are able to remap your car to provide better performance and also economy, this will increase performance and save you money at the pump.

Additional Options

We offer a range of comprehensive services and solutions to make your vehicle unique & increase the performance or better the reliability.

July 16, 2026
We recently carried out a bespoke Stage 1 ECU calibration on this Mercedes-AMG GLC 43, unlocking additional performance from the twin-turbocharged V6 engine while maintaining the refinement, drivability and everyday usability expected from an AMG SUV. Performance Figures  Stock: 390 hp / 520 Nm Stage 1: 420 hp / 620 Nm Increase: +30 hp / +100 Nm The Stage 1 calibration delivers a noticeable improvement throughout the rev range, with stronger mid-range torque, sharper throttle response and improved acceleration. The additional torque helps the GLC 43 pull harder from lower RPM while providing a more urgent and responsive feel under acceleration, making overtaking and motorway driving considerably more effortless while retaining smooth power delivery for everyday use. Unlike generic tuning files, our calibrations are developed to provide strong, usable performance while remaining within the safe operating limits of the vehicle. Additional Software Options Included As part of this vehicle's setup, we also carried out: Speed Limiter Removal Dealer-Level Diagnostics Included Every tuning appointment includes advanced dealer-level diagnostics before and after the calibration process. This allows us to identify any underlying issues that could affect performance and confirm the vehicle is operating correctly once the software installation is complete. Fully Mobile Mercedes Tuning At MTech Tuning, we provide a fully mobile service, travelling directly to your home or workplace at no additional cost. There is no need to visit a tuning centre or leave your vehicle for the day. We bring professional ECU tuning and diagnostics directly to you. We regularly cover Somerset and surrounding areas, providing mobile ECU remapping, gearbox tuning and performance software solutions for Mercedes-Benz, BMW, Audi, Volkswagen and many other manufacturers. 0% Finance Available We understand that vehicle modifications can be a significant investment, which is why we offer flexible finance options, including 0% finance on eligible purchases. Instant BHP Checker Curious what your vehicle is capable of? Visit our website and use the Instant BHP Checker to view estimated performance gains for your car, or get in touch to discuss the best tuning options available. Mercedes GLC 43 Remap • Mercedes-AMG GLC 43 Stage 1 • Mercedes GLC 43 ECU Tuning • Mobile Mercedes Remapping • Dealer-Level Diagnostics • Somerset MTech Tuning – Professional Mobile ECU & Gearbox Tuning
July 16, 2026
Engine Tune: Stock - 265 hp / 620 nm Stage 1 - 310 hp / 700 nm ( +45 hp +80 nm ) Ad ons: -Speed limiter off -Sports display updated Advanced dealer level diagnostic included 🏁 We are fully mobile meaning we will travel to your vehicle at home or work free of charge! 🏡 Get in touch now or visit our website for INSTANT BHP CHECKER Link in bio. 📲 0% finance options available
June 18, 2026
BMW 740d Back to Stock

Pay just 25% of your bill today

NO FEE NO INTEREST NO CATCH

£200 minimum spend

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