Disclaimer : Cancellations within 24 hours are subject to a cancellation fee. After 24 hours, a higher fee will apply.

Unlock the hidden performance potential of your 2020-2026 Mercedes-Benz GLB250 or GLB35 AMG X247 with GCA Performance ECU Tuning. Designed with a performance-first approach, this ECU calibration upgrade transforms your vehicle’s throttle response, acceleration, and overall driving experience.

This is more than just adding horsepower — GCA Performance tuning optimizes the entire powerband for stronger torque delivery, sharper throttle response, improved boost control, and more consistent performance from low-end acceleration to high-RPM power.

Every tune is developed with your vehicle’s factory ECU data securely saved, allowing the vehicle to be returned to the original stock calibration at any time.

We Stand Behind Our Products

• All GCA Performance products include a 1-Year Warranty

Tuning Specifications

• Fits: 2020 2021 2022 2023 2024 2025 2026 X247 Mercedes-Benz GLB250 GLB35 AMG
• Engine: 2.0L Turbo Inline-4 M260 Engine
• Downpipe readiness with check engine light suppression (for off-road use only)
• Enhanced exhaust acoustics with extended or adjustable burble settings
• Factory speed governor removal for unrestricted performance
• Octane-specific calibration optimized for your fuel quality
• Fully adjustable cold start behavior (On/Off)
• 100% reversible — return to factory settings anytime
• Stage 1 tuning available with factory downpipes
• Stage 2 tuning available with GCA Performance downpipes
• Stage selection will be confirmed through tuning instructions after purchase
• No additional charge for Stage 2 tuning

Performance Gains

• Horsepower Gain: Up to +70 HP
• Torque Gain: Up to +70 TQ

Important Notes:

• The factory vehicle includes torque and horsepower limitations. For maximum gains, purchasing a CPC module is recommended.
• Without the CPC module, gains of approximately +40 HP and +40 TQ can still be achieved.
• Vehicles manufactured after June 2020 (06/2020+) may have a factory ECU lock. If an ECU unlock is not purchased, the customer must arrange ECU unlocking before tuning can be completed.

Tuning Instructions

• After purchase, detailed tuning instructions will be emailed to you.
• The ECU must be removed and shipped to GCA Performance for tuning.

Vehicle Fitment

Mercedes-Benz GLB-Class (X247)

• 2020 Mercedes-Benz GLB250
• 2021 Mercedes-Benz GLB250
• 2022 Mercedes-Benz GLB250
• 2023 Mercedes-Benz GLB250
• 2024 Mercedes-Benz GLB250
• 2025 Mercedes-Benz GLB250
• 2026 Mercedes-Benz GLB250
• 2020 Mercedes-Benz GLB35 AMG
• 2021 Mercedes-Benz GLB35 AMG
• 2022 Mercedes-Benz GLB35 AMG
• 2023 Mercedes-Benz GLB35 AMG
• 2024 Mercedes-Benz GLB35 AMG
• 2025 Mercedes-Benz GLB35 AMG
• 2026 Mercedes-Benz GLB35 AMG

Platform: X247
Engine: 2.0L Turbo M260

Upgrade your Mercedes-Benz GLB250 or GLB35 AMG with GCA Performance ECU Tuning and experience improved acceleration, sharper response, stronger torque delivery, and optimized performance tailored to your vehicle.