DOC #CERT-938C-9B2C-A287
11.09.2026
Performance Report
ECU Chiptuning — Stage 1
Document Date
11.09.2026
Mercedes-Benz X-Klasse
2017 -> 350d 258hp Diesel
Original
258HP
550 Nm
Stage 1
290HP
690 Nm
+32 HP / +12% +140 Nm / +25%
Estimated Power and Torque Curve
Customer
Chassis
Date
Signature
Stamp
NOTICE: This document represents estimated values based on database information. It is not valid as official certification without the original handwritten signature and physical stamp of the authorized technician. Performance values may vary based on vehicle condition, fuel quality and operating environment.