BenzUnited Parts
ECU Tuning for Mercedes M112 E37 3.7L V6 – ML350, S350, SL350
ECU Tuning for Mercedes M112 E37 3.7L V6 – ML350, S350, SL350
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Wake Up Your Mercedes 3.7L V6
ML350 · S350 · SL350
Tired of the numb, laggy throttle in your M112 E37? Our precision ECU calibration delivers stronger mid-range torque, sharper response, and a far more connected driving feel—while keeping your Mercedes reliable and dealer-friendly.
🔥 Real-World Performance Gains
- Up to +20 HP and +20 TQ (premium fuel, healthy engine)
- Factory Output: 232 HP @ 5,750 rpm / 255 TQ @ 3,000–4,500 rpm
Expect noticeably quicker 50-80 mph passing, crisper throttle response off the line, and smoother power delivery throughout the rev range.
The E37’s 97 mm bore and 10.0:1 compression ratio respond exceptionally well to optimized ignition timing, fueling, and throttle mapping.
✔️ Why Owners Love Our M112 Tune
- Instant Pedal Response — Eliminates factory lag for a more engaging, linear drive.
- Factory Safety Systems Fully Retained — OEM knock, thermal, and emissions protections remain active.
- Built for Daily Driving & Longevity — Refined torque curve that’s strong yet smooth.
- Dealer-Safe & Reversible — Discreet calibration that won’t raise flags during service.
🔧 Simple Bench Flash Process
- Mail your ECU to us → We read, custom calibrate, and flash it on the bench.
- Shipped back to you ready to install — plug-and-play in most cases.
- Optional: Pair with a high-flow intake for even better mid-range gains (contact us).
📌 Supported Models (M112 E37 3.7L)
| Model | Years |
|---|---|
| ML350 | 2001–2004 |
| S350 | 2002–2005 |
| S350 4MATIC | 2002–2005 |
| SL350 | 2001–2006 |
Bring Your E37 Back to Life
Experience the responsive, torquey drive your 3.7L Mercedes was always capable of delivering.
Order Today – Limited Bench Flash Slots Each Week
Questions? Email us at benzunitedparts@gmail.com
We reply fast and are happy to help with fitment or process questions.
