Stage 3 Adaptive OBD2 Performance Chip for Mercedes-Benz - Plug-In Module (+40 HP / +45 TQ)

Stage 3 Adaptive OBD2 Performance Chip for Mercedes-Benz

Plug-in performance module for Mercedes-Benz cars, trucks and SUVs with an OBD2 port (1996 and newer). Stage 3 is our strongest setup: up to +40 HP and +45 lb-ft on turbocharged engines. No flashing, no ECU unlock, no app.

Rated 4.8/5 by 21 verified buyers | Lifetime warranty | 30-day returns | Ships within 24 hours, most orders arrive in 3-5 days | Assembled in the USA, programmed in house for your vehicle

Choosing your engine size and options

Pick the three options above, then type your make, model and year in the "Enter Make, Model, Year" box right under them.

Engine Size (common Mercedes-Benz engines):

• 4 Cylinder: 2.0L turbo (C300, CLA, GLA, GLC)
• 6 Cylinder: 3.0L turbo V6 / inline-6, 3.5L V6
• 8 Cylinder: 4.0L biturbo V8 (AMG), 4.7L / 5.5L V8, 6.2L AMG V8
• 12 Cylinder: 5.5L / 6.0L V12 (S600, SL600, S65)

Engine Modifications (If any): Stock Vehicle, Intake, or Intake and Exhaust, to match what's on your vehicle now.
Tuned for: Performance for the full Stage 3 setup; MPG for a smoother, economy-focused setup if you mostly cruise.
Not sure? Contact us before ordering.

What to expect

• Quicker throttle response. Less of that dead spot when you roll into the pedal from a stop or to pass.
• More midrange pull. Merging, passing, climbing a grade with a load.
• Doesn't change your drive modes. Your factory drive modes stay as Mercedes-Benz set them up.
• Realistic gains. It's a plug-in module, not a full ECU re-flash. Up to +40 HP / +45 lb-ft on turbocharged engines; non-turbo engines gain less. (Stage 1: +20 HP / +15 lb-ft; Stage 2: +28 HP / +26 lb-ft)

How it works

The module plugs into your OBD2 port and works alongside the factory engine computer. It's adaptive: it reads how you're driving, from throttle position to fuel demand, and adjusts its output to match. Easy cruising stays smooth; get on it or tow and it gives you more. Nothing inside the engine computer is rewritten. Each chip is programmed in house for the make, model and year you enter and the options you pick.

Install in about a minute

1. Find the OBD2 port under the dash on the driver's side.
2. Engine off, connect the module with the included plug-in cable (long enough for any vehicle).
3. Turn the key. The PWR, LNK and DAT LEDs confirm it's connected. Drive normally for a few trips.

Dealer visit or recall? Unplug it first and your Mercedes-Benz is stock.

100% safe and warranty friendly

The module works within safe limits for your engine and leaves the factory programming untouched.

• Lifetime warranty on the module.
• 30-day returns. If it's not for you, send it back.
• Ships within 24 hours; most orders arrive in 3-5 days.
• Assembled in the USA and programmed in house for your vehicle.
• In the box: the module (with PWR / LNK / DAT LEDs) and a plug-in OBD2 cable.
• Questions? Contact us and a real person will answer.

Common Questions

Will it fit my Mercedes-Benz?
If it has an OBD2 port (1996 and newer), yes: C-Class, E-Class, GLC, GLE, S-Class, CLA, G-Class and more. Pick your Engine Size and enter your make, model and year when you order.

How much power will I actually get?
Up to +40 HP and +45 lb-ft on turbocharged engines. Naturally aspirated engines gain less. You'll feel it most as sharper throttle and stronger midrange.

What does "adaptive" mean?
It watches throttle position and fuel demand and adjusts. Light cruising stays smooth; hard acceleration and towing get the full Stage 3 output.

Not sure which engine size?
Here's a quick guide: the Engine Size list above shows common Mercedes-Benz engines. Still unsure? Contact us before ordering.

Will the dealer know?
Unplug it before service and your Mercedes-Benz is completely stock. Nothing stays behind in the engine computer.

Why does the module say JDM PROM?
JDM PROM is the brand name on the module and its retail box. Every unit is programmed in house for your specific Mercedes-Benz make and model, assembled in the USA, and backed by our lifetime warranty and 30-day return window.