GLS63 X166 ECU REMAP

Custom Remap for the Mercedes-AMG GLS 63 (X166) at MSL Performance

Let’s be honest, you already own the ultimate family flagship. The GLS 63 is the S-Class of SUVs, a seven-seat luxury behemoth with the thunderous heart of the 5.5-litre Bi-Turbo V8. It’s a vehicle that provides effortless performance and commands the road. But have you ever been behind the wheel, felt that immense power, and thought that deep down, it could be even more… commanding? More responsive, more aggressive, a whole lot more potent? You’re right. It can be.

Here at MSL Performance in Birmingham, we are experts in AMG’s legendary V8 engines. We don’t believe in generic, one-size-fits-all tunes. We’re about rolling up our sleeves and giving your GLS 63 the personal attention it deserves. We craft a completely custom map, specifically for your engine, to deliver a flawless uplift in performance, safely and reliably.

Find Your Perfect Level of Power

Every GLS 63 owner has a different vision for their vehicle. That’s why we’ve developed a clear tuning path, from a formidable enhancement to an all-out transformation.

Stage 1: The “First-Class Express” Tune

This is for the driver who wants to transform their GLS 63 into a true high-performance machine, without changing any hardware. We meticulously recalibrate the engine’s software to unlock a massive new level of power and torque. The throttle becomes more immediate, making this large SUV feel surprisingly agile, while overtaking on the motorway becomes utterly effortless. It’s the GLS 63 you love, but with the shocking performance to rival genuine sports cars.

• The Result: Up to the 660 bhp mark and a colossal 150 lb-ft of additional torque.
• What you need: Just your car! No extra parts are required.

Stage 2: For When You Want to Unleash the Thunder

Ready to transform your GLS 63 into the ultimate performance SUV? Stage 2 is where we unlock the V8’s true voice and fury. By installing high-flow downpipes, we remove the main restriction in the exhaust, allowing the twin turbos to spool faster and breathe more freely. This enables our custom tune to deliver a far more aggressive and sustained pull, accompanied by a glorious, deep and enhanced exhaust note that perfectly matches the GLS 63’s indomitable character.

• The Result: Up to the 680 bhp mark.
• What you need: Downpipes are essential for this stage.

So, Why Come to MSL?

Because we are just as passionate about your GLS 63 as you are. We believe tuning is an art form, and we take immense pride in every single car that leaves our workshop. When you bring your AMG to us, you’re not just getting a remap; you’re getting the full MSL experience – honest advice, expert workmanship, and the peace of mind that your pride and joy is in the safest hands in the business.

Ready to feel the difference? Give us a call or drop by our workshop here in Birmingham. We’d love to have a chat about your car and figure out the perfect plan to unleash its true potential.