| Manufacturer | Weistec |
| Street legal in all the US States | No |
| Tuning Method | Cypher TCU Flash Tool or Cypher Pro Dealer |
| year | make | model | trim | engine |
|---|---|---|---|---|
| 2022 | Mercedes-Benz | Sprinter | 3500 (W907) | Turbocharged 3L V6 (OM642) |
| 2021 | Mercedes-Benz | Sprinter | 3500 (W907) | Turbocharged 3L V6 (OM642) |
| 2020 | Mercedes-Benz | Sprinter | 3500 (W907) | Turbocharged 3L V6 (OM642) |
| 2019 | Mercedes-Benz | Sprinter | 3500 (W907) | Turbocharged 3L V6 (OM642) |
| 2022 | Mercedes-Benz | Sprinter | 4500 (W907) | Turbocharged 3L V6 (OM642) |
| 2021 | Mercedes-Benz | Sprinter | 4500 (W907) | Turbocharged 3L V6 (OM642) |
| See more | ||||
Product Description
The CPC (computer powertrain control) is the powertrain control unit, another control module that is somewhat similar to the ECU (engine control unit). In modern Mercedes vehicles it is responsible for controlling multiple vehicle features such as the active exhaust valves, throttle pedal, and speed limiter. It is also home to several torque limiters that used to solely be in the ECU.
Benefits of doing a CPC upgrade?While it does not directly control the engine, the torque limiters in the CPC restrict what the ECU is able to do, when controlling the engine. The Weistec CPC is a complete replacement for the original CPC module. It has the torque limiters set to values that effectively "remove" the limits, allowing the ECU to operate with fewer restrictions when it comes to making power. The speed limiter is also removed, allowing higher top speeds. When requested, it can even be set up so that the active exhaust valves are always in the open position. The Weistec CPC is also a great compliment for any tuned modern Mercedes vehicle offering better and more consistent performance and higher top speeds.
Key Features
- Raised torque limits
- Disabled speed limiter
- Complete replacement module
- Optional exhaust valves "Always Open"
- 100% Intercooler pump operation
- Increased cooling fan speeds
How Do You Get Your Sprinter CPC Upgrade Tuned?
Follow these steps — this is what your specific vehicle needs and supports.
Choose Your Tune Stage
Core Improvements
Standard with this tuneFree Add Ons
Pick Your Tuning Method

Cypher Plus
Order a Cypher Plus and tune your car yourself from your phone, entirely through the MyFlasher app. Watch how it works.

Mail It In
Remove your ECU or TCU and mail it to us for tuning. Required for some applications.

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.

Cypher Pro Dealer
Visit a certified Cypher Pro Dealer near you. Find one with our dealer locator.
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.
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.
