What’s Included in the Cobb Tuning Power Package

The Cobb Tuning Power Package for the Mercedes-AMG C63 with the M177 engine is a comprehensive bundle designed to unlock significant horsepower and torque gains. It typically includes a high-flow intake system, a pre-loaded Accessport tuner, and detailed installation instructions. The intake replaces the restrictive factory airbox with a larger, less restrictive filter and intake tube, while the Accessport allows you to flash the ECU with performance calibrations specifically developed for the M177. This package is popular among enthusiasts because it offers a plug-and-play solution that doesn’t require custom dyno tuning for most users.

Tools and Preparation

Required Tools and Supplies

  • Cobb Tuning Power Package (intake components + Accessport)
  • Metric socket set (8mm, 10mm, 13mm)
  • Torque wrench (ft-lb range)
  • Flathead screwdriver (for hose clamps)
  • Phillips screwdriver (for small trim clips)
  • Trim removal tool (optional but helpful)
  • Zip ties (assorted sizes)
  • Safety glasses
  • Mechanics gloves
  • Shop towels

Pre-Installation Safety and Workspace

Work in a well-ventilated area, preferably a garage with the door open. The M177 engine bay gets hot quickly, so allow the engine to cool completely before starting. Disconnect the battery negative terminal (10mm nut) and wait at least five minutes before touching any electrical connectors. Have a fire extinguisher rated for Class B and C nearby. Read the entire Cobb instruction manual once before picking up a tool — some steps may require special attention to torque values or hose routing.

Installation Steps

Step 1: Disconnect the Battery

Locate the battery in the trunk (right side under a plastic cover). Use a 10mm socket to loosen the negative terminal clamp and remove the cable. Wrap the cable end with a shop towel or tape to prevent accidental contact. This step is critical to avoid short circuits and to reset the ECU before flashing.

Step 2: Remove the Engine Cover

The plastic engine cover is held by six bolts (8mm). Remove them with a socket wrench and set the cover aside on a clean surface. You may need to gently lift the cover near the oil cap — it has rubber grommets that can stick. Inspect the grommets for cracks and replace if needed.

Step 3: Remove the Factory Intake System

Start by disconnecting the mass air flow (MAF) sensor electrical connector. Press the locking tab and pull the connector straight off. Use a flathead screwdriver to loosen the hose clamps on the intake tube at the throttle body and the airbox. Remove the intake tube, then unclip the airbox housing. The M177 has two airboxes — one on each side. Unbolt the lower airbox brackets (13mm) and lift the boxes out. Note the routing of any vacuum lines or breather hoses attached to the factory intake; you may need to reuse them with the Cobb system.

Step 4: Install the Cobb Intake System

Cobb’s intake for the M177 includes two high-flow filters and custom intake tubes with integrated MAF sensor mounts. Fit the filters onto the MAF housings and secure with the supplied hose clamps. Mount the intake tubes to the throttle bodies, making sure the silicone couplers are fully seated and the clamps are snug but not overtightened (Cobb recommends 3-4 Nm on smaller clamps). Reconnect the MAF sensor connectors. Ensure the intake tubes do not rub against any engine components or sharp edges. Use zip ties to secure any loose vacuum lines away from moving parts. Double-check that all clamps are tight by pulling gently on the tubes.

Step 5: Reinstall the Engine Cover (Optional)

Some Cobb package installations allow the engine cover to be refitted, but you may need to trim a small section if the intake tubes interfere. If trimming is required, use a rotary tool with a cutting wheel and sand the edges smooth. Secure the cover with the original bolts, torqued to 7.5 Nm (5.5 ft-lb) to prevent cracking the plastic.

Step 6: Connect the Cobb Accessport Tuner

Locate the OBD-II port under the dashboard, to the left of the steering column. Plug the Accessport cable into the port. The Accessport will power on automatically. Follow the on-screen prompts to select your vehicle (Mercedes-Benz / C63 AMG / 2015-2018). The device will read the stock ECU file and save it as a backup. Do not disconnect the Accessport during this process — it can corrupt the ECU.

Step 7: Flash the Performance Calibration

After the backup is saved, the Accessport will offer a list of available maps. For a basic stage 1 setup (intake + 91 octane fuel), select the “Stage1 91 OCT” map. Confirm your choice and let the flashing process begin. The engine will cycle the cooling fans and gauges will sweep — this is normal. The entire flash takes about 5-8 minutes. Once complete, the Accessport will display “Flash Complete.” Disconnect the device from the OBD port and set it aside. Reconnect the battery negative terminal and tighten to 18 Nm (13 ft-lb).

Step 8: Initial Start-Up and Check

Get into the driver’s seat with the key fob. Press the start button — the engine should crank and start within a few seconds. Let it idle for 2-3 minutes to allow the ECU to adapt. Check for any abnormal noises, vibrations, or warning lights on the dashboard. If the check engine light comes on, stop and scan for codes using the Accessport (it can read and clear codes). Common trivial codes after a flash are related to emissions monitors that will clear after a drive cycle.

Post-Installation Checks and Data Logging

Inspect for Air Leaks

With the engine running, spray a small amount of brake cleaner or water near the intake couplers. If the idle changes, you have a leak that needs tightening. Also inspect all hoses for contact with hot surfaces or moving parts.

Monitor Engine Parameters

The Cobb Accessport can display real-time data. Drive the car gently for the first 10-15 miles while monitoring:

  • Boost pressure (should peak at ~18-20 psi on stage 1 depending on fuel)
  • AFR (air-fuel ratio) (target 12.0-12.5:1 under load)
  • Intake air temperature (IAT) (should stay within 10-15°F of ambient)
  • Knock correction (should not show more than -4 degrees of timing pull)

If any parameter is abnormal, stop and consult the Cobb support forums or a professional tuner.

Perform a Learning Drive

The ECU needs to relearn fuel trims and throttle adaptation. Drive at varying speeds and loads for 50-100 miles. Avoid wide open throttle (WOT) runs until the learning process is complete. After that, enjoy the full performance — expect a significant increase in mid-range torque and a more aggressive throttle response.

Troubleshooting Common Issues

Check Engine Light After Flash

If the CEL appears, connect the Accessport and read the code. Common codes: P0128 (coolant thermostat) may appear if the flash reset adaptations — clear it and drive. P0171/P0174 (lean codes) indicate an intake leak — recheck all couplers and MAF sensor connections.

Rough Idle or Stalling

This is often caused by a dirty MAF sensor. Clean the sensor with MAF cleaner (do not touch the wire). Alternatively, the idle may improve after the ECU completes its adaption cycle. If it persists, try re-flashing the map after clearing adaptations via the Accessport.

Loss of Boost or Hesitation

Check for boost leaks — common areas are the diverter valve hoses and the intake-to-throttle body coupler. Also verify that the vacuum line to the wastegate (if still using factory solenoids) is not kinked or disconnected. The Cobb map expects factory boost control solenoids to be functioning correctly.

Performance Expectations

With the Cobb Tuning Power Package installed and using 91 octane fuel, the M177 engine typically gains 40-60 horsepower and 50-70 ft-lb of torque at the wheels. The power delivery becomes much more linear, with a noticeable surge from 3500 rpm to redline. The intake sound is also more audible — a deeper growl that amplifies the twin-turbo spool. If you upgrade to 93 octane or E30 blends, the gains can approach 70 whp. For those seeking more, Cobb offers stage 2 maps that require downpipes, but the base package already transforms the car’s character.

Final Considerations

Before starting, verify that your vehicle’s ECU software version is supported by Cobb. Visit the Cobb Tuning official website for the latest compatibility list. Joining forums like MBWorld or the Cobb support community can provide additional tips and custom map options from respected tuners. Remember that any ECU modification can affect emissions compliance and warranty — check local regulations before proceeding.

Installing the Cobb Power Package is one of the most rewarding upgrades for the C63 M177. With careful attention to detail and this expanded guide, you can confidently unlock your engine’s potential while maintaining reliability.