| Weistec Horsepower | 550 |
| Weistec Torque | 575 |
| Manufacturer | Weistec |
| Street legal in all the US States | No |
| Engine Family | M176 |
| Stock Horsepower | 416 |
| See more | |
| year | make | model | trim | engine |
|---|---|---|---|---|
| 2023 | Mercedes-Benz | G550 | Base (W463) | Twin Turbo 4L V8 (M176) |
| 2022 | Mercedes-Benz | G550 | Base (W463) | Twin Turbo 4L V8 (M176) |
| 2023 | Mercedes-Benz | G500 | Base (W463) | Twin Turbo 4L V8 (M176) |
| 2022 | Mercedes-Benz | G500 | Base (W463) | Twin Turbo 4L V8 (M176) |
| 2020 | Mercedes-Benz | S560 | Maybach (X222) | Twin Turbo 4L V8 (M176) |
| 2019 | Mercedes-Benz | S560 | Maybach (X222) | Twin Turbo 4L V8 (M176) |
| See more | ||||
Product Description
The M176 belongs to Mercedes-AMG's 4.0L twin-turbo "hot-V" V8 family, the M176/M177/M178 group whose turbochargers sit nestled inside the cylinder banks instead of outside them, a genuinely clever layout that shortens the path from exhaust to intake for sharper response. Where the M177 and M178 wear full AMG badges in cars like the E63 S and AMG GT, the M176 is the version Mercedes fits to its non-AMG V8 flagships, S-Class and GLS-Class among them, calibrated with more emphasis on refinement and mild-hybrid efficiency than outright track aggression, but built on exactly the same sophisticated hot-V architecture underneath.
Weistec's ECU calibration for the M176 works within that factory hardware, recalibrating boost, ignition, and fueling strategy through the existing turbos and internals. Every OEM protection system, knock detection, thermal management, factory diagnostics, remains fully intact, and the payoff is a large, broadly-felt gain in both power and torque, delivered with the same validation discipline Mercedes-AMG applies to its own calibration work. The hot-V architecture was already special; this is what it does when it's allowed to fully open up.
Related Items
How Do You Get Your M176 ECU Tune Tuned?
Follow these steps — this is what your specific vehicle needs and supports.
2
Choose Your Tune Stage
3
Core Improvements
Standard with this tune4
Free Add Ons
Want it louder?
This tune can have Burble/Pops added or increased on deceleration, at no additional charge. Select an intensity below and we'll add it to your order, or mention it when requesting your tune — through the Cypher+ app, your calibration request form, or when placing your order.
Want to stop the stopping?
Auto Start-Stop can be turned off as part of your ECU tune, at no additional charge. On some vehicles it may also need to be addressed in our as well — there's no guarantee either way, so mention it when requesting your tune and we'll confirm for your specific car.
5
See the full tuning process →
Pick Your Tuning Method
1Selected
Cypher Plus
Order a Cypher Plus and tune your car yourself from your phone, entirely through the MyFlasher app. Watch how it works.
2Selected — Pick return shipping at checkout
Mail It In
Remove your ECU or TCU and mail it to us for tuning. Required for some applications.
3Selected — Pick Will call at checkout
In Person
Bring your vehicle, or just your ECU/TCU, to our Anaheim, CA headquarters. Call 714-202-0005 or email sales@weistec.com to schedule.
4Selected — Order through your local dealer
Cypher Pro Dealer
Visit a certified Cypher Pro Dealer near you. Find one with our dealer locator.
6
Complete The Upgrade
An ECU tune alone won't remove all factory limits or fix how power reaches the ground. Add these to round out the upgrade with no limitations.
Read the full CPC & TCU breakdown →
What is a CPC module?
The CPC (Central Powertrain Control) is a separate control unit that manages things like the active exhaust valves, radiator fan, intercooler pumps, and speed limiter. On many newer Mercedes-Benz vehicles, it also houses torque limiters that can hold back an ECU tune from reaching its full potential.
What is a TCU tune?
A TCU (transmission control unit) tune delivers faster, firmer shifts with higher line pressure, reducing clutch slip and increasing the transmission's torque capacity. It's a worthwhile upgrade on its own, or paired with an ECU tune for a fully sorted powertrain.
Your Total
Good to Know
- This is a reflash of your original module, not a stand-alone unit.
- Power gains vary by vehicle, modifications, fuel, and operating conditions (ambient temperature, altitude, etc.).
- New or upgraded spark plugs are always recommended when tuning.
- Product may not be emissions compliant. Check local laws prior to installation.
- Always use a battery charger during programming.