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Mercedes-Benz CLA 2019+ 45 AMG S 421hp Stage 1 Chip Tuning · ECU Remap

Name: Mercedes-Benz CLA 2019+ 45 AMG S 421hp Stage 1 Chip Tuning
Brand: Mercedes-Benz

Catalog reference — not a measured result for this vehicle.

How much bhp does Mercedes-Benz CLA 45 AMG S 421hp chip tuning add?

Catalog reference: power 421 → 470 bhp, difference +49 bhp (12%); torque 500 → 620 Nm. Actual results depend on vehicle condition and measurement.

Power421 → 470 bhp+49 bhp (+12%)

Torque500 → 620 Nm+120 Nm (+24%)

Figures are typical ranges; exact results depend on the vehicle's hardware and dyno measurement.

Stage 1 Remap Stage 2 Remap Pop & Bang Speed Limiter (Vmax) Removal DTC / Fault Code Removal

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Mercedes-Benz CLA 2019+ 45 AMG S 421hp

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Reversible: Yes, the original software is kept

Mercedes-Benz CLA 2019+ 45 AMG S 421hp — Stage 1 Remap

Stage 1 re-calibrates the ECU software — boost, fuelling and ignition maps — within the factory hardware's safe tolerances. No hardware changes are required.

Solutions for this vehicle

Mercedes-Benz CLA 45 AMG S 421hp Pop & Bang tuning

Mercedes-Benz CLA 45 AMG Stage 1: all generations →

Stage 1 Remap

Software that optimises the engine's power and torque maps within safe limits.

Stage 2 Remap

Advanced software matched to hardware upgrades such as a sport exhaust or induction kit.

Pop & Bang

Software that creates exhaust crackle on lift-off.

Speed Limiter (Vmax) Removal

Removing the factory top-speed limiter from the software.

DTC / Fault Code Removal

Switching off selected diagnostic trouble codes (DTC) in the ECU software.

In Taiwan

Where can this be done near you?

GP Power ECU applies the software at its workshop in Hukou, Hsinchu, using EcuPrime-developed files; workshops can also order the file directly.

ENGINE FAMILY

About the Mercedes-AMG 45 2.0 turbo (M133 and M139)

The 2.0-litre four-cylinder turbo of the A45, CLA45, GLA45 and GLB45 is among the most ambitious engines of its class in power per litre: the M133 (360–381 hp, 2013–2019) followed by the M139 (387–421 hp).

How a Stage 1 remap works on the Mercedes-Benz CLA 45 AMG S 421hp

Stage 1 recalibrates boost, ignition and fuelling within the limits of the original hardware. As the factory tune is already high, the gain is kept proportionate; torque arrives earlier and mid-range acceleration hardens noticeably. The DCT torque limit is respected.

Pre-remap checklist

Spark plugs and ignition coils; this engine is sensitive to plug life.
High-pressure fuel pump and injectors.
Intercooler circuit and boost leaks.
High-octane fuel and oil service intervals.

This section is based on GP Power ECU workshop experience; the power and torque figures come from the catalogue measurement above.

ECUs used in Mercedes-Benz vehicles

If you know your ECU family, its page lists exactly which solutions are available for it.

DELPHI CRD3 (ALL)BOSCH EDC16C31 BOSCH EDC17C66 BOSCH MD1CP001 DELPHI CRD2 (ALL)BOSCH EDC17C46 BOSCH EDC16 BOSCH EDC17C10 All ECU families →

Mercedes-Benz CLA — Power Calculator

Engine	Power	Gain
180 (1.3T) 136hp	136 → 174 bhp	+38 bhp
180d (1.5D) 116hp	116 → 145 bhp	+29 bhp
200 (1.3T) 163hp	163 → 184 bhp	+21 bhp
200d (2.0D) 150hp	150 → 200 bhp	+50 bhp
220 (2.0T) 190hp	190 → 250 bhp	+60 bhp
220d (2.0D) 190hp	190 → 220 bhp	+30 bhp
250 (2.0T) 224hp	224 → 250 bhp	+26 bhp
250e 218hp	218 → 262 bhp	+44 bhp
35 AMG 306hp	306 → 345 bhp	+39 bhp
45 AMG 387hp	387 → 470 bhp	+83 bhp

Frequently asked questions

How much bhp does Mercedes-Benz CLA 45 AMG S 421hp chip tuning add?

Catalog reference: power 421 → 470 bhp, difference +49 bhp (12%); torque 500 → 620 Nm. Actual results depend on vehicle condition and measurement.

Will chip tuning damage the engine?

No. Values stay inside the safety margin the manufacturer leaves; engine, gearbox and turbo limits are not exceeded. Every file is verified with a road test and data logging. If the car needs maintenance first (worn injectors, blocked filter, weak clutch) we tell you before starting.

Will my fuel consumption go up?

With the same driving style it usually drops, because you hold the same speed at lower revs and less throttle. If you use the extra power, consumption naturally rises. It is down to your right foot.

How long does it take? Do I leave the car?

Most cars take 1–2 hours and you get the car back the same day; no need to leave it. Some models need the ECU removed, which takes longer — we tell you when booking.

Can I go back to stock later?

Yes. The original file is read and archived before any work. We restore the factory software free of charge whenever you ask.

Does it void my warranty?

Changing engine software can affect the manufacturer warranty. If a dealer finds a fault to be software related, they may refuse that claim. We want you to decide knowing this. Your original file stays with us and can be restored before a dealer visit.

Will it pass the roadworthiness test?

Stage 1 power software does not touch emission hardware. Work on emission systems is offered only for uses permitted by law; road use and inspection compliance remain the owner's responsibility.

How much does Mercedes-Benz CLA 45 AMG S 421hp chip tuning cost?

Price depends on the vehicle, the ECU and the solution chosen. Send us your vehicle details on WhatsApp and we will quote straight away. Inspection and measurement are free.

How is the work done?

We scan for faults and read the original software first. The file is adapted to your car's hardware, written, and verified on a road test. The original is archived.

What is checked on the Mercedes-Benz CLA 45 AMG S 421hp before remapping?

Before working on the Mercedes-AMG 45 2.0 turbo (M133 and M139) we check: Spark plugs and ignition coils; this engine is sensitive to plug life. High-pressure fuel pump and injectors. Intercooler circuit and boost leaks. High-octane fuel and oil service intervals. If something needs attention, maintenance comes first; the remap is applied to a healthy engine.

⚠ Software work on emission systems is offered only for uses permitted by applicable law (motorsport, off-road use, export, fault diagnosis, etc.). Road use and inspection compliance of the vehicle remain the owner's responsibility.