420 CDI (4.0) - 314ch Tuning
Mercedes E — Detailed power and torque gains by stage.
Gains by stage(2)
Power
314 hp
Torque
730 Nm
diesel
Power
314→354ch
+40 ch
+13%
Torque
730→810Nm
+80 Nm
+11%
OriginalTuned
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Everything about 420 CDI (4.0) - 314ch tuning
Tuning the 420 CDI (4.0) - 314ch found in the Mercedes E is one of the most popular performance upgrades. This engine offers excellent potential for power and torque gains.
On ChiptuneMAP, find verified gain data for each stage, compare tuner prices and find the ideal professional for your project.
Gains summary by stage
On the Mercedes E 420 CDI (4.0) - 314ch, tuning delivers up to +76 hp and +160 Nm depending on the stage. Stock vs tuned figures:
| Stage | Power | Torque | Indicative price |
|---|---|---|---|
| Stage 1 | 314 → 354 hp | 730 → 810 Nm | — |
| Stage 2 | 314 → 390 hp | 730 → 890 Nm | — |
Frequently asked questions
What gains can I expect from tuning the 420 CDI (4.0) - 314ch?
Tuning the 420 CDI (4.0) - 314ch (Mercedes E) delivers significant power and torque gains depending on the chosen stage. Stage 1, with no hardware modifications, offers the best gain-to-reliability ratio.
Is tuning reliable on the 420 CDI (4.0) - 314ch?
Yes, the 420 CDI (4.0) - 314ch is known for its reliability when tuned, especially at Stage 1. It's essential to use a certified tuner with maps tailored to your engine.
How much does Mercedes E tuning cost?
Prices vary by stage and tuner. Check our directory to compare rates from professionals near you.
Should I get a tuning box or an ECU remap?
ECU remapping (modifying the engine control unit map) delivers better results and integration than a plug-in tuning box. It's customized for each engine.
How do I find a tuner for my Mercedes E?
Use the ChiptuneMAP directory to find a certified tuner near you. Compare reviews, prices and specialties.