45 AMG S (2.0T) - 421ch Tuning
Mercedes CLA — Detailed power and torque gains by stage.
Gains by stage(4)
Power
421 hp
Torque
500 Nm
essence
Power
421→460ch
+39 ch
+9%
Torque
500→560Nm
+60 Nm
+12%
OriginalTuned
Find a tuner
Compare certified professionals near you.
Everything about 45 AMG S (2.0T) - 421ch tuning
Tuning the 45 AMG S (2.0T) - 421ch found in the Mercedes CLA 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 CLA 45 AMG S (2.0T) - 421ch, tuning delivers up to +89 hp and +120 Nm depending on the stage. Stock vs tuned figures:
| Stage | Power | Torque | Indicative price |
|---|---|---|---|
| Stage 1 | 421 → 460 hp | 500 → 560 Nm | — |
| Stage 2 | 421 → 510 hp | 500 → 620 Nm | — |
| E85 Flexfuel | 421 → 421 hp | 500 → 500 Nm | — |
| E85+ | 421 → 460 hp | 500 → 560 Nm | — |
Frequently asked questions
What gains can I expect from tuning the 45 AMG S (2.0T) - 421ch?
Tuning the 45 AMG S (2.0T) - 421ch (Mercedes CLA) 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 45 AMG S (2.0T) - 421ch?
Yes, the 45 AMG S (2.0T) - 421ch 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 CLA 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 CLA?
Use the ChiptuneMAP directory to find a certified tuner near you. Compare reviews, prices and specialties.