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

Unlock the full performance potential of your 2022+ Mercedes-Benz C300 W206 with the GCA Performance ECU Tune. Engineered with a performance-first approach, this custom ECU calibration enhances throttle response, acceleration, and overall driving dynamics while optimizing the factory 2.0L turbocharged engine.

Developed by German Car Accessories (GCA) under our GCA Performance lineup, this ECU tune improves torque delivery, sharpens throttle input, and refines the entire powerband for a more responsive and engaging driving experience. From everyday driving to spirited performance runs, your C300 will deliver stronger acceleration and improved drivability.

GCA Performance securely saves your factory ECU data, allowing you to restore the original factory calibration at any time.

We Stand Behind Our Products

• All GCA Performance products include a 1-Year Warranty.

Fitment

Fits:

• 2022 Mercedes-Benz C300
• 2023 Mercedes-Benz C300
• 2024 Mercedes-Benz C300
• 2025 Mercedes-Benz C300
• 2026 Mercedes-Benz C300

Chassis:

• W206

Engine:

• 2.0L Turbocharged M254 Engine

Key Features

• Custom GCA Performance ECU calibration
• Increased horsepower and torque output
• Improved throttle response and acceleration
• Enhanced mid-range power delivery
• Optimized engine performance throughout the RPM range
• Enhanced exhaust acoustics with adjustable burble settings
• Factory speed governor removal
• Octane-specific calibration tailored to fuel quality
• Adjustable cold start behavior (On/Off)
• Factory ECU data backup and restoration capability
• Fully reversible back to stock settings
• Stage 1 and Stage 2 tuning available

Tuning Specifications

• Engine: 2.0L Turbocharged M254
• Horsepower Gain: +60 HP
• Torque Gain: +60 TQ

Available Tuning Options:

Stage 1

• Designed for vehicles with factory downpipes

Stage 2

• Designed for vehicles equipped with GCA Performance downpipes

Stage 2 calibration is available at no additional charge. Tuning requirements will be confirmed after purchase.

ECU Unlock Information

• The factory ECU on the W206 C300 comes locked.
• If an ECU unlock is not purchased, the customer must arrange ECU unlocking before tuning can be completed.

Tuning Instructions

• After purchase, tuning instructions will be emailed to you.
• ECU removal and shipment to GCA Performance will be required for calibration.
• Professional installation is always recommended.

Important Disclaimer

Removing, disabling, or modifying emissions-related equipment on pollution-controlled vehicles may be illegal. This product is intended only for racing, competition, track, hobby, or off-road use.

Installation and use of aftermarket software may affect vehicle drivability, reliability, emissions compliance, insurance coverage, and factory warranty. All installation and usage risks are the responsibility of the end user and installer.