Ignitions and Electrical› Computers, Chips, Modules and Programmers

RENNtech

ECU Upgrade Performance Tuning Module

$995.00

SKU: 54.211.E350

In Stock
In Stock
Ships by Jul 29
Free Shipping
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Easy — 1–2 hours

Description

The RENNtech ECU Upgrade is a performance tuning module for the Mercedes-Benz W211 E350. It allows for unlimited switching between tuned and stock ECU programming without requiring ECU removal. The module stores both the tuned and stock files and plugs directly into the OBD2 port for easy programming.

This tuning software modifies ignition timing, throttle mapping, and air/fuel ratios to optimize engine performance. It also increases the engine's rev limiter and modifies boost mapping for turbocharged vehicles, unleashing the Mercedes' true potential.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandRENNtech
Part Number54.211.E350
CategoryIgnitions and Electrical

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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