Mercedes-AMG AMG GT C C190/R190 ECU Remapping

Mercedes-AMG AMG GT C C190/R1904.0 V8 BiTurbo · 2017–2021

Stage 1 £699

4.9/5500+ Google ReviewsSee Google Reviews

The Mercedes-AMG AMG GT C C190/R190 (2017 to 2021) leaves the factory with 557 PS and 680 Nm from its 4.0 petrol engine. Our Stage 1 estimate takes it to 600 PS and 800 Nm, roughly 8% more power and 18% more torque.

Mercedes-AMG

ECU confirmed on inspection

AMG GT C

C190/R190 · 4.0

Stage 1 estimate

600 PS

STX Tuning

Stage 1 price

£699

Stage 1 ECU remap

Estimated gain

+43 PS · +120 Nm

Power

Stock

557 PS

Stage 1

600 PS

Torque

Stock

680 Nm

Stage 1

800 Nm

Figures are STX Tuning estimates for a healthy standard car, not a dyno result for your vehicle. Power is shown in PS. These are existing vehicle library estimates, not independently measured results.

Where would you like it done?

01753 439130

WhatsApp STX Tuning

More Mercedes-AMG tuning

AMG GT C190

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AMG GT 4-Door 63 X290

AMG GT 4-Door 63 4.0 Petrol

AMG GT 4-Door 63 S X290

AMG GT 4-Door 63 S 4.0 Petrol

AMG GT 63 C192

AMG GT 63 4.0 Petrol

AMG GT R C190

AMG GT R 4.0 Petrol

AMG GT S C190

AMG GT S 4.0 Petrol

C43 W205/C205 FL

C43 3.0 Petrol

What we do

More than just ECU remapping.

From Stage 1 and Stage 2 ECU remapping to gearbox tuning and supporting performance upgrades, STX Tuning offers specialist vehicle software and tuning services for compatible petrol and diesel cars and vans.

Explore the available options for your exact vehicle at our Slough workshop, with suitable mobile ECU remapping appointments available across selected surrounding areas.

Stage 1 & Stage 2 ECU RemappingStage 1 Stage 2
Turbo Petrol ECU Tuning
Turbo Diesel ECU Tuning
Pops & Bangs
Performance Remapping
Economy ECU Remapping

Not sure which tuning service you need?

Tell us what you drive and what you'd like to achieve. We'll check your vehicle and help you explore the available options.

4.9/5 | 500+ Google Reviews

Get my tuning quote Call STX Tuning: 01753 439130

Google Customer Reviews

What Mercedes-AMG Owners Say

See what customers say about their experience with STX Tuning.

Google Reviews

4.9

535 Google Reviews

Stuart Webster
Jul 2025
Really happy with the remap on my van highly recommend.
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Nikos Argalias
Jun 2025
Had a stage 2 ecu tuning and air filter install, and the guys were really great to work with. Car feels noticeably faster. I would highly recommend these guys.
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Loizos Kyriacou
Jun 2025
Went to remap my GLE 250d and the whole process was smooth from start to finish. Super responsive, and had the job done quickly with zero hassle. The results are brilliant , noticeable power gains straight away and smoother drive overall. Would highly recommend them to anyone looking for a quality remap with excellent customer service!
Posted on Google · view on our Google profile
Debby Cunliffe
Jun 2025
Fantastic service. Came to my home on a Sunday to remap my car. Great job done and lifetime warranty plus interest free payment facility over 4 months available. Highly recommend
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danny george
Mar 2025
the staffat stx tuning was so excellent dealing with the problem i been having with ad blu and fixed issue in an hr highly reccomened
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Peter Paprocki
Mar 2025
Great remap car feel great They fit me in on my lunch break 😁 and manged to do it asap
Posted on Google · view on our Google profile
iulian cirloaba
Feb 2025
"Really happy with the remap done on my car, polite, efficient service and would highly recommended!!!!!!!!!
Posted on Google · view on our Google profile
Daniel Sullivan
Jan 2025
Highly recommended service. The team at STX are very accommodating and professional. Had a remap on my Audi which was turned around in a day. Running perfectly. I will definitely be back for additional work in the near future.
Posted on Google · view on our Google profile
Stephen Hall
Jan 2025
Great and quick service, sorted my emissions error out on my car , "Really happy with the remap done on my car, polite, efficient service and would highly recommended"
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Faeba Francis
Dec 2024
I was really happy with my remap for my Mercedes C class. Very professional and quick response. Would highly recommend.
Posted on Google · view on our Google profile
Tony Thorpe
Dec 2024
STX tuning really looked after me and my van, explained the process and carried out work without any fuss whatsoever! Van has been perfect since. Would definitely recommend to anyone to use! Keep up the good work guys!
Posted on Google · view on our Google profile
nathan meacock
Nov 2024
Really happy with the remap done on my car, very welcoming and polite with good communication
Posted on Google · view on our Google profile

Read all Google reviews Ask STX on WhatsApp

Mercedes-AMG AMG GT C C190/R1904.0 V8 BiTurbo · 2017–2021

More Mercedes-AMG tuning

More than just ECU remapping.

01ECU & Performance Tuning

02Engine & Hardware Upgrades

03Emissions-related Enquiries

04Specialist Vehicle Software

Get Your AMG GT C C190/R190 Quote

What Mercedes-AMG Owners Say