Mercedes 420 CDI (4.0) Tuning
Supported in 4 Mercedes models, 2005+.
Mercedes
4 supported 420 CDI (4.0) applications
Models With the Mercedes 420 CDI (4.0)
All Supported Mercedes 420 CDI (4.0) Tunes
| Model | Years | Version | Stock power | Controller | Platform |
|---|---|---|---|---|---|
| E | 2006+ | W211 | 314 hp | ECU Bosch EDC16CP36 | AutoTuner |
| GL | 2006+ | X164 | 306 hp | ECU Bosch EDC16CP36 | AutoTuner |
| ML | 2005+ | W164 | 306 hp | ECU Bosch EDC16CP36 | AutoTuner |
| S | 2005+ | W221 | 320 hp | ECU Bosch EDC16CP36 | AutoTuner |
About Mercedes 420 CDI (4.0) tuning
We tune the Mercedes 420 CDI (4.0) in 4 applications across the E, GL, ML, S, from 2005+, in diesel form, with stock outputs of 306-320 hp. Calibrations are written on AutoTuner for your exact hardware and fuel, then proven on our Dynojet 424xLC2 in Jenison, MI.
This engine runs on: Bosch EDC16CP36.
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.