Your Vehicle
Mercedes-Benz CLS 450 (3.0T) 389hp
Technical Specifications
Power and torque increase
Stage 1: software remap only, no mechanical changes, fully reversible.
Power HP
Torque Nm
Book your Stage 1 remap
499 € VAT included · pay online, the work is done at the workshop you choose
Power Graph
Mercedes-Benz CLS 450 (3.0T) 389hp: da 389 a 420HP
Remapping Mercedes-Benz CLS
MasterTuning is a leader in developing remapping for Mercedes-Benz. La Mercedes-Benz CLS 450 (3.0T) 389hp può passare da 389 HP a 420 HP con un incremento di 31 HP.
The development of each remap is customized by MasterTuning.
- 100% tested and customized files guarantee
- Tested and developed on a 4x4 dyno
- Best performance, within safety margins
- Reduced fuel consumption
ECU Remapping Details Mercedes-Benz CLS 450 (3.0T) 389hp
The Mercedes-Benz CLS 450 (3.0T) 389hp is equipped with a petrol engine that produces 389 HP and 500 Nm of torque in its factory configuration. With MasterTuning's professional ECU remapping, this Mercedes-Benz can achieve 420 HP (+8%) and 600 Nm (+20%).
Our Stage 1 tuning for the CLS C257 - 2018 - 2020 delivers an impressive gain of +31 HP and +100 Nm, optimizing the petrol engine's performance while maintaining reliability and staying within safe parameters.
The engine code M256 identifies this specific powerplant configuration. The Bosch MG1CP002 ECU is professionally recalibrated to unlock hidden potential while preserving engine longevity.
With 389 HP from factory, this Mercedes-Benz CLS is already a performance vehicle. Our remapping extracts even more potential, delivering exhilarating acceleration and enhanced driving dynamics for enthusiasts who demand the best.
Technical Specifications — Mercedes-Benz CLS 450 (3.0T) 389hp
Factory technical data for the Mercedes-Benz CLS 450 (3.0T) 389hp (C257 - 2018 - 2020), used by MasterTuning engineers to develop a tailored, dyno-tested remap for this specific powerplant.
| Engine code | M256 |
|---|---|
| ECU / Control unit | Bosch MG1CP002 |
| Fuel | Petrol |
| Compression ratio | 10.5 |
| Bore × stroke | 83.0 X 92.4 mm |
| Stock power | 389 HP · 500 Nm |
| Remapped power (Stage 1) | 420 HP (+31) · 600 Nm (+100) |
Don't want to touch the ECU?
Rapid Dimsport add-on modules connect to the engine sensors with original connectors: they fit in a few hours and come off without a trace, leaving the factory software untouched. Useful on a leased car, one still under warranty or one you plan to sell soon. Check which ones fit your Mercedes-Benz CLS.
Frequently Asked Questions - Mercedes-Benz CLS
How much power can I gain from remapping my Mercedes-Benz CLS?
With MasterTuning Stage 1, your Mercedes-Benz CLS 450 (3.0T) 389hp can gain +31 HP (from 389 to 420 HP) and +100 Nm of torque. This represents a 8% increase in power.
Is ECU remapping safe for the Mercedes-Benz CLS engine?
Yes, MasterTuning's remapping for the Mercedes-Benz CLS 450 (3.0T) 389hp is developed within safe parameters. All calibrations are tested on our 4x4 dyno and stay within the mechanical limits of the M256 engine.
Is the Mercedes-Benz ECU remapping reversible?
Absolutely. The original factory calibration of your Mercedes-Benz CLS is always backed up before remapping. The process is 100% reversible at any time.
Will remapping affect my Mercedes-Benz warranty?
ECU remapping may affect your manufacturer warranty. We recommend checking your specific warranty terms. Many of our customers choose to remap after the warranty period or accept this trade-off for the significant performance gains.
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Book your remap or ask for a quote
Stage 1 can be bought online and is done at the workshop you choose; for Stage 2 we send you a quote.
Stage 2 is quoted on request: write to us and we will reply with price and timing.
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