Mercedes-Benz Tune

Get a professional Mercedes-Benz ECU tune from Viezu USA — sharper throttle response, stronger torque across the power band, and a more connected driving experience from a calibration built for your specific platform. From the turbocharged 4-cylinder C300 to the hand-built AMG 4.0L V8, Mercedes engines respond exceptionally well to professional tuning — and Viezu's calibrations are built to match the precision these vehicles were engineered with.

Select your model, engine, year, and tune type below. Your vehicle-specific add-on price will be reflected at checkout.

What's Included

• Custom ECU calibration built for your specific engine and platform
• US-based technical support before, during, and after your tune
• Dyno-documented results (in-house flash)
• Clear communication on turnaround time and expectations
• Follow-up support if adjustments are needed

Tune Types Available

Stage 1 — OBD Tune
No hardware modifications required. Tuned directly through the OBD port. The most accessible entry point for Mercedes platforms including C300, E300, GLC300, and the full AMG lineup. Meaningful power and torque gains without touching a single component.

Stage 2 — Supporting Modifications Required
For vehicles running upgraded intake, exhaust, intercooler, or other hardware. Stage 2 extracts everything your modifications have to offer with a calibration built around your exact setup. Contact us before ordering to confirm your build is Stage 2 ready.

Economy / MPG Tune
Optimized for real-world fuel efficiency without sacrificing drivability. A smart option for C300, E300, and GLE owners who want more from their tank. Particularly effective on the M260/M264 and M256 platforms.

AMG Performance Tune
Purpose-built for AMG platforms — M177, M178, M157, and M139 engines. These calibrations are developed with AMG's engineering tolerances in mind, delivering stronger mid-range torque and higher peak output without compromising the reliability AMG owners expect. Available for C63, E63, GLC63, GLE63, G63, and AMG GT platforms.

Diesel Performance Tune
Built for the Sprinter, GLE, and GLS diesel platforms. Improved torque delivery, stronger throttle response, and better pulling power — purpose-built for commercial operators and towing applications. Available for OM642 and OM656 platforms.

Diesel Economy Tune
Calibrated for fuel efficiency on Mercedes diesel platforms. Practical for high-mileage Sprinter operators and daily drivers looking to reduce operating costs without sacrificing reliability.

Delivery Options

Handheld Tuner — Mailed to You
We ship a pre-loaded handheld tuning device directly to you. Plug it into your OBD port, follow the simple instructions, and your vehicle is tuned. No shop visit required. Compatible with most Mercedes platforms.

Local Flash — Salt Lake City, UT
Bring your vehicle to our Salt Lake City location for an in-person ECU flash. Includes a dyno pull for documentation. Best option for Stage 2 builds, AMG platforms, or vehicles requiring bench access.

Supported Platforms (2015 and newer)

Sedans, Coupes & Roadsters: A220, AMG GT / GTS / GTC / GTR, AMG GT 4-Door (GT43 / GT53 / GT63), C300, C43 AMG, C63 AMG, CLA250, CLA35 AMG, CLA45 AMG, CLS400 / CLS450 / CLS53 AMG, E300, E350, E400, E450, E43 AMG, E53 AMG, E63 AMG, S450 / S500 / S550 / S560 / S580, S63 AMG, S65 AMG, SL43 / SL55 AMG / SL63 AMG, SLC300 / SLC43 AMG, SLK250 / SLK300 / SLK350

SUVs & Crossovers: G550, G63 AMG, GLA250, GLA35 AMG, GLA45 AMG, GLB250, GLB35 AMG, GLC300, GLC43 AMG, GLC63 AMG, GLE350 / GLE400 / GLE450, GLE53 AMG, GLE63 AMG, GLK250 / GLK350, GLS450 / GLS550 / GLS580, AMG GLS63

Vans & Commercial: Metris, Sprinter

Don't see your exact configuration? Contact us at usa@viezu.com before ordering and we'll confirm compatibility.

Important Notes

• 2020+ AMG models with Bosch MG1 ECU (M139, M256, M177 in newer applications) require a bench unlock before tuning — similar to BMW post-2016. Contact us before ordering to confirm what's needed for your specific year and model. We'll give you a clear answer before you spend a dollar.
• AMG tunes are platform-specific. C63, E63, and GLC63 each have distinct calibration requirements. When in doubt, contact us first — we'll confirm the correct tune for your exact build.
• Stage 2 requires a pre-order consultation. We need to know your exact build before confirming pricing and turnaround.
• Sprinter operators: fleet pricing is available for multiple vehicles. Contact us at usa@viezu.com for volume pricing.
• Emissions compliance is your responsibility. Tuning may affect emissions output. Off-road and track use only where applicable by law.
• Don't see your engine in the list? Select "Other — Contact Us" and we'll follow up with compatibility and pricing.
• EQ electric vehicles are not supported via traditional ECU tuning and are not included in this product.