Mercedes-AMG GLC43 X253/C253 FL ECU Remapping

Mercedes-AMG GLC43 X253/C253 FL3.0 V6 BiTurbo · 2019–2022

Stage 1 £499

4.9/5500+ Google ReviewsSee Google Reviews

The Mercedes-AMG GLC43 X253/C253 FL (2019 to 2022) leaves the factory with 390 PS and 520 Nm from its 3.0 petrol engine. Our Stage 1 estimate takes it to 440 PS and 620 Nm, roughly 13% more power and 19% more torque.

Mercedes-AMG

ECU confirmed on inspection

GLC43

X253/C253 FL · 3.0

Stage 1 estimate

440 PS

STX Tuning

Stage 1 price

£499

Stage 1 ECU remap

Estimated gain

+50 PS · +100 Nm

Power

Stock

390 PS

Stage 1

440 PS

Torque

Stock

520 Nm

Stage 1

620 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

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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

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
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iulian cirloaba
Feb 2025
"Really happy with the remap done on my car, polite, efficient service and would highly recommended!!!!!!!!!
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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.
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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.
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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!
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nathan meacock
Nov 2024
Really happy with the remap done on my car, very welcoming and polite with good communication
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ಠ_ಠ
Nov 2024
Honestly well happy with the stage 1 re map, was worried if I would even feel a power difference from 125-151bhp but I can assure you it’s a difference, aswell as a good high change in torque. It took about 30 minutes, brilliant service, and dome good tips on how to take care of my car after ⭐️⭐️⭐️⭐️⭐️
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Viktor
Nov 2024
I am really happy with the remap done on my car, polite, efficient service, and would highly recommend these guys for remap.
Posted on Google · view on our Google profile
Dylan Stokell
Oct 2024
Thanks guys for my Remap, massive difference and all round great experience from start to finish. Great prices and great customer service!!
Posted on Google · view on our Google profile

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Mercedes-AMG GLC43 X253/C253 FL3.0 V6 BiTurbo · 2019–2022

More Mercedes-AMG tuning

More than just ECU remapping.

01ECU & Performance Tuning

02Engine & Hardware Upgrades

03Emissions-related Enquiries

04Specialist Vehicle Software

Get Your GLC43 X253/C253 FL Quote

What Mercedes-AMG Owners Say