300 EU6 - 258ch Tuning
Mercedes GLC — Detailed power and torque gains by stage.
Gains by stage(4)
Power
258 hp
Torque
400 Nm
essence
Power
258→295ch
+37 ch
+14%
Torque
400→450Nm
+50 Nm
+13%
OriginalTuned
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Everything about 300 EU6 - 258ch tuning
Tuning the 300 EU6 - 258ch found in the Mercedes GLC 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 GLC 300 EU6 - 258ch, tuning delivers up to +62 hp and +100 Nm depending on the stage. Stock vs tuned figures:
| Stage | Power | Torque | Indicative price |
|---|---|---|---|
| Stage 1 | 258 → 295 hp | 400 → 450 Nm | — |
| Stage 2 | 258 → 320 hp | 400 → 500 Nm | — |
| E85 Flexfuel | 258 → 258 hp | 400 → 400 Nm | — |
| E85+ | 258 → 295 hp | 400 → 450 Nm | — |
Frequently asked questions
What gains can I expect from tuning the 300 EU6 - 258ch?
Tuning the 300 EU6 - 258ch (Mercedes GLC) 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 300 EU6 - 258ch?
Yes, the 300 EU6 - 258ch 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 GLC 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 GLC?
Use the ChiptuneMAP directory to find a certified tuner near you. Compare reviews, prices and specialties.