Description Mercedes X-Class 250d ECU Tuning Unlock safe, proven gains with professional ECU tuning for a more responsive Mercedes X-Class 250d with our in-house ECU calibration. Whether you choose a Stage 1, 2 or 3 calibration, each level is designed to safely enhance performance, torque, and drivability for your exact setup. Tuning is completed in-house by Sunshine Coast Diesel Tuning using advanced, licensed calibration tools with dyno verification available. Stage 1 – The Best Bang for Your Buck Stage 1 tuning delivers the most noticeable improvement for the least cost — a true transformation without changing any factory hardware. Power increases from 190 hp to 210 hp and torque from 450 Nm to 500 Nm, resulting in smoother delivery, stronger mid-range pull, and improved towing performance. Measured Gains: 20 hp / 50 Nm (190 → 210 hp, 450 → 500 Nm) Hardware: No modifications required Benefits: Sharper throttle, smoother drivability, safer overtaking power Recommended Upgrades: While not required, an intercooler, performance intake, and cat-back exhaust will enhance cooling and airflow, unlocking even better performance. Stage 1 is the biggest bang-for-your-buck upgrade — reliable, efficient, and ideal for daily driving or towing applications. Stage 2 – Performance Hardware Upgrade Stage 2 builds on the Stage 1 calibration but is designed for vehicles fitted with key supporting modifications. This level delivers higher torque and sustained power under load, making it ideal for heavy towing, off-road setups, or performance-oriented builds. Minimum Requirements: Full exhaust system, upgraded intake, and improved intercooler/cooling system Benefits: Increased torque and mid-range response, reduced EGTs, and more efficient airflow for prolonged high-load performance Custom Calibration: Each tune is individually adjusted to suit your hardware setup for optimal balance between power and reliability Stage 3 – Maximum Performance Stage 3 tuning is designed for full performance builds where every supporting system has been upgraded. It provides significant gains in both power and torque through advanced fuelling and charge system improvements. Minimum Requirements: All Stage 2 upgrades plus fuel system modifications and a turbocharger upgrade Purpose: Built for high-performance or competition/off-road use where power delivery and responsiveness are prioritised over comfort Custom Tuning: Tailored calibration for each build to ensure safe operation under extreme conditions Additional Options (Off-Road Use Only) EGR Deactivation (off-road use only) DPF Deactivation (off-road use only) AdBlue Deactivation (off-road use only) Hardcut Limiter *Off-road options are intended for closed-course or off-road use only. See our Terms & Conditions for details. Specifications Vehicle: Mercedes X-Class 250d (2017 ) ECU Type: Factory ECU (calibrated in-house) Power/Torque Gains: 20 hp / 50 Nm (Stage 1 baseline) Hardware Changes: Required for Stage 2–3 only Hardware Included: No hardware or performance parts are included with any tuning stage. All parts and upgrades will be quoted individually based on customer specifications. For a tailored quote on your build, email us at [email protected]. What’s Included Vehicle health and diagnostic checks prior to tuning In-house ECU read, calibration, and validation Road test and post-tune verification Optional dyno verification (by appointment) Service Details Type: On-site ECU remap at Sunshine Coast Diesel Tuning Turnaround: Same-day service (by appointment) Remote Tuning Option: If you’re located remotely, we can supply a personal flashing tool that allows you to load and log tuning files we provide. The additional cost for this service is $600, which includes shipping anywhere in Australia and New Zealand. Pricing: Quoted individually based on tune level, hardware, and options Professional ECU Tuning on the Sunshine Coast All tuning is carried out by our experienced team using industry-grade calibration tools and dyno equipment. We focus on performance without compromise — smooth, strong power delivery and reliability for Australian conditions. Bookings are essential via the Sunshine Coast Diesel Tuning website.
