STX Tuning
WhatsApp STX TuningCall STX Tuning

Mercedes-AMG GLC63 X253/C253 ECU Remapping

Mercedes-AMG GLC63 X253/C2534.0 V8 BiTurbo · 2017–2022

Stage 1 £699

Get my quote →
4.9/5500+ Google ReviewsSee Google Reviews

The Mercedes-AMG GLC63 X253/C253 (2017 to 2022) leaves the factory with 476 PS and 650 Nm from its 4.0 petrol engine. Our Stage 1 estimate takes it to 570 PS and 780 Nm, roughly 20% more power and 20% more torque.

Stage 1 price

£699

Stage 1 ECU remap

Estimated gain

+94 PS · +130 Nm

Power

Stock
476 PS
Stage 1
570 PS

Torque

Stock
650 Nm
Stage 1
780 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

AMG GT 4.0 Petrol

AMG GT 4-Door 53 X290

AMG GT 4-Door 53 3.0 Petrol

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 C C190/R190

AMG GT C 4.0 Petrol

AMG GT R C190

AMG GT R 4.0 Petrol

AMG GT S C190

AMG GT S 4.0 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.

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 quoteCall STX Tuning: 01753 439130

Get Your GLC63 X253/C253 Quote

Select one or more services and send your enquiry to STX Tuning.

Your vehicle
What do you need?

1 service selected: Stage 1

Where would you prefer the work?
Your details

We save your enquiry first, then WhatsApp opens with your message ready. Press Send in WhatsApp to complete it.

Call STX: 01753 439130
  • 4.9/5 Google rating · 535 reviews
  • Slough workshop
  • Vehicle-specific quotes

No payment needed. We use your details only to handle this enquiry. See our privacy policy.

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

  • Chris Green

    Aug 2026

    Contacted these guys and they came out within 2 days fixed the car and now all is perfect again really happy with the remap done on my car too very polite, efficient service and would highly recommended

    Posted on Google · view on our Google profile

  • Tiinkerj

    Jul 2026

    I wanted to leave a genuine review, I got my car remapped on the 5th June 2026. Making the appointment was very easy, I didn’t have to wait too long for an appointment and had the option for someone to come to my house if needed. The remap was done within an hour or so. My light did come back on a week after the remap was done, but I was able to clear it with no issues and last weekend I took a 4 hour round trip to the beach and the light did not come back on when usually it does after about 1hr into a drive. The point of my long review is I highly recommend this company and I am very happy with the service provided.

    Posted on Google · view on our Google profile

  • Oscar Rapala

    Jun 2026

    First time tuning my car. Didn’t know what to expect but it was amazing. They explained everything to me clearly, how it works etc and before you know it my car was ready. 10/10 polite service. Will be coming back in the future with serious motors, can tell these guys are professionals judging by tons of performance cars outside.

    Posted on Google · view on our Google profile

  • Jamiah Woodroffe

    Apr 2026

    Really five star service I’ve only got my car the day before I messaged on a Sunday just as an inquiry was more than Happy to take time of the day on a Sunday to fit me in last minute just want to think the whole team very professional and I absolutely love my car. I felt an instant power boost and explained everything to me and packages that I can definitely most likely in the future upgrade to will be definitely coming again.

    Posted on Google · view on our Google profile

  • Tracy

    Jan 2026

    Amazing company, arrived within 2 hours of my call and fixed the problem where another garage had failed. So happy to have the issue resolved, technician was so nice and explained everything, excellent service, highly recommend STX Tuning

    Posted on Google · view on our Google profile
Read all Google reviews Ask STX on WhatsApp