Siemens SIM266 ECU Tuning
Engine control unit used in 2 supported models from 1 make.
Mercedes with the Siemens SIM266
All Mercedes tunes- Mercedes A1997+W168, W169 · 150, 160, 170, 180, 200, 200 TURBOAutoTuner
- Mercedes B2005+W245, W246 · 150, 160, 170, 180, 200, 200 TURBOAutoTuner
About Siemens SIM266 tuning
The Siemens SIM266 engine control unit is supported in 2 models from Mercedes. We read, modify, and flash it with AutoTuner, then verify the result on our Dynojet 424xLC2 in Jenison, MI. A custom calibration optimizes fueling, ignition timing, boost, and torque limits for your exact build.
Don't See Your Vehicle?
These lists cover off-the-shelf tuning platforms. We also do standalone ECU installs and custom calibrations, so reach out and we'll tell you what's possible for your build. Compatibility data last updated 2026-09-24.