Mercedes ECU & Gearbox Remapping in North Somerset & South Wales


MTechTuning provides professional ECU and gearbox remapping for Mercedes-Benz vehicles, improving performance, drivability and efficiency while maintaining refinement and long-term reliability. We offer a fully mobile Mercedes tuning service across North Somerset and South Wales, carrying out all work at your home or workplace.


Specialist Mercedes Tuning Using Dealer-Level Diagnostics


Mercedes vehicles are engineered to deliver comfort, performance and smooth power delivery, but factory software can often restrict their full potential. Our Mercedes ECU and gearbox remaps are carefully calibrated to enhance torque delivery, throttle response and overall drivability without compromising refinement or reliability.


All Mercedes tuning work is carried out using dealer-level diagnostics, with full vehicle health checks completed before and after tuning. This ensures all systems are operating correctly and allows us to tailor the software specifically to your vehicle.

Mercedes ECU & Gearbox Remapping


For optimal results, Mercedes ECU remapping can be paired with gearbox remapping to ensure the engine and transmission work together seamlessly. This can improve shift smoothness, responsiveness and make better use of the available torque, particularly in automatic and AMG models.


Mercedes Models We Commonly Tune:

Mercedes A-Class, C-Class, E-Class and S-Class 

Mercedes GLA, GLC and GLE models 

Mercedes AMG and AMG-Line vehicles 

Petrol and diesel Mercedes engines 

Safe, Reliable Mercedes Tuning


Reliability is always the priority. All Mercedes ECU and gearbox software installed by MTechTuning is covered by a lifetime software warranty, with clear and honest advice provided before any work is carried out.


If you’re looking for professional Mercedes ECU or gearbox remapping, get in touch to discuss your vehicle and requirements.

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May 22, 2026
Ford Kuga Stage 1 ECU Remap
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BMW 320d Stage 1 ECU Remap & Gearbox Tune
May 13, 2026
This BMW X5 40d received a custom Stage 1 ECU remap from MTech Tuning Ltd .  Performance Figures Stock Power: 306 hp / 600 Nm Stage 1 Power: 340 hp / 680 Nm Gains: +34 hp / +80 Nm The BMW 40d platform responds extremely well to Stage 1 tuning, delivering noticeably stronger mid-range performance, improved throttle response, and smoother power delivery throughout the rev range. The additional torque improves overall drivability while maintaining the refinement expected from the X5 platform. Optional Software Add-Ons Available add-ons include: Speed limiter removal Dealer-Level Diagnostics Included All tuning work includes advanced dealer-level diagnostics before and after programming to ensure the vehicle is operating correctly throughout the process. Fully Mobile BMW Remapping Service MTech Tuning provides fully mobile ECU remapping across North Somerset & South Wales. We can carry out tuning at your home or workplace with no additional travel charge. Areas covered include: Bristol Weston-super-Mare Cardiff Newport North Somerset South Wales Why Tune a BMW X5 40d? A Stage 1 remap on the BMW X5 40d improves: Mid-range pulling power Overtaking performance Throttle response Overall drivability The factory hardware on the BMW 40d engine comfortably supports Stage 1 power levels, making it one of the most popular BMW diesel engines for tuning. Looking for BMW X5 40d Tuning? Use the Instant BHP Checker at MTech Tuning Ltd to check available tuning options for your vehicle. 0% finance options available.