How do I know I'm working on the right module?

The factory sticker must read CPC_NG. If it reads DRVUNG (AMG Drive Unit), that is a different module — do not remove it. Contact AMR Performance if you are unsure.

Do I need any coding or programming after installing the AMR CPC?

No on-car coding is required — the AMR CPC is supplied ready to install. Just confirm all connectors are fully seated before starting the vehicle.

The car won't start or shows faults after install. What should I check?

Re-check that all three harness connectors clicked fully home and that the negative battery terminal is tight. A partially seated connector is the most common cause. If it persists, contact support.

Why upgrade the CPC in the first place?

The factory CPC caps torque, boost, and speed independently of the ECU, so an ECU calibration alone cannot release the full potential of the vehicle.

AMR CPC Upgrade Installation Guide | AMR Performance

Step-by-step instructions for removing your factory CPC and installing the AMR CPC upgrade. Take your time, keep your hardware organized, and work clean — the CPC is a security-coded module.

Before you touch anything

Disconnect the negative (-) battery terminal and let the vehicle sit for 15-20 minutes before touching the CPC. Working on a live module can damage it or set permanent fault codes.

Tools required

10mm socket with a short extension and ratchet
T30 driver (some brackets use 10mm fasteners instead)
Plastic trim / panel pry tools
A small tray to keep fasteners organized

Step 1 — Before you begin

Unlock the vehicle and fully lower the driver and passenger windows, so you're never locked out with the battery disconnected.
Disconnect the negative (-) battery terminal and let the vehicle sit for 15-20 minutes to discharge residual voltage.

Step 2 — Access the factory CPC

Open the passenger-side door and remove the foot rug / floor mat.
Locate the plastic kick panel in the passenger footwell (under the carpet / ECU tray). On AMG models this is the right-side kick area.
Using a 10mm socket, remove the kick panel fasteners and lift the panel away.
The CPC module will be visible once the panel is removed.

Step 3 — Disconnect the CPC

Three connectors secure the harness to the module — two large and one small.

Confirm the module before you unplug anything. Check the factory sticker — it must read "CPC_NG". If it reads "DRVUNG" (AMG Drive Unit), stop: that is a different module and is not the CPC this upgrade replaces.

For each connector, press the lock tab, then pull straight back on the connector body — no prying on the wires.
Inspect the pins for corrosion or bent terminals; clear any dust as needed.

Step 4 — Remove the CPC module

Remove the bracket fasteners (typically T30 or 10mm) and keep the hardware organized.
Push down on the CPC from behind the bracket, and from the side, to release the factory push clip, then slide the module out.

Tip: photograph the factory label before you set the module aside — the part number and software identifiers are useful if support needs to confirm your module.

Step 5 — Install the AMR CPC upgrade

Slide the new replacement unit into the factory bracket. Listen for the slight click as it seats.
Reconnect the three factory harness clips until you hear and feel the positive click on each one.

A connector that isn't fully locked causes intermittent no-starts and stored faults. Make sure each of the three clicks home before moving on.

Step 6 — Reassemble and reconnect

Reinstall the factory kick panel.
Replace the insulation / carpet and the kick and sill trims.
Reconnect the negative (-) battery terminal and tighten the clamp.
Turn the ignition on (don't crank) for about 30 seconds to let modules wake, then start the vehicle and confirm normal operation with no warning lamps.

Before you drive — quick check

AMR CPC fully seated in the factory bracket (clicked home)
All three harness connectors locked (positive click on each)
Kick panel, carpet, and trims reinstalled
Negative battery terminal reconnected and tight
Engine starts and idles with no warning lamps

Frequently Asked Questions

How do I know I'm working on the right module?: The factory sticker must read CPC_NG. If it reads DRVUNG (AMG Drive Unit), that is a different module — do not remove it. Contact AMR Performance if you are unsure.
Do I need any coding or programming after installing the AMR CPC?: No on-car coding is required — the AMR CPC is supplied ready to install. Just confirm all connectors are fully seated before starting the vehicle.
The car won't start or shows faults after install. What should I check?: Re-check that all three harness connectors clicked fully home and that the negative battery terminal is tight. A partially seated connector is the most common cause. If it persists, contact support.
Why upgrade the CPC in the first place?: The factory CPC caps torque, boost, and speed independently of the ECU, so an ECU calibration alone cannot release the full potential of the vehicle.