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RennTech ecu+ upgrade - ECU+ Upgrade for the 2014-2016 E 550

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RennTech dyno chart for the W212 E 550 ECU+ upgrade - ECU+ Upgrade for the 2014-2016 E 550

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RennTech options module showing the stock and modified switch - ECU+ Upgrade for the 2014-2016 E 550

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RennTech HHT tuner for the GL 450 - ECU+ Upgrade for the 2014-2016 E 550

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RennTech ECU+ (Plus) Upgrade 2014-2016 Mercedes-Benz E 550 W212

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Brand: RennTechSKU / Part #: 54.212.E550BT.FL

Regular price: $2,405.60
Regular price: ~~$2,480.00~~
Sale price: $2,405.60
Unit price: per

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Subtotal: $2,405.60

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RennTech ECU+ (Plus) Upgrade 2014-2016 Mercedes-Benz E 550 W212

Subtotal: $2,405.60

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Overview

RennTech built its name in Florida tuning high-performance engines, and this ECU+ Upgrade for the 2014-2016 E 550 is the result of in-house dyno development on the 4.6L M278 twin-turbo V8. Timing, throttle, air-fuel and boost tables are revised as one calibration, so the car pulls harder everywhere while staying a comfortable daily driver. RennTech rates the car at 540 hp and 705 lb-ft with this upgrade. That is a gain of 105 hp and 262 lb-ft.

Key details

Rated at 540 hp and 705 lb-ft, gains of 105 hp and 262 lb-ft. The tuner flashes either file through the OBD2 port in a few minutes, as often as you like, without removing the ECU.

Watch it explained

Features

Revised ignition timing, throttle mapping, air-fuel ratios and boost control
Gains across the entire rev range, not just at peak
Developed on RennTech's own dyno and road tested
Keeps factory-like drivability and reliability for daily use
93 octane or better recommended for the full calibration

What is included

RennTech calibration for your car
Delivery as listed by RennTech for this model (HHT tuner or ECU flash)

Specs

Part number	54.212.E550BT.FL
Engine	4.6L M278 twin-turbo V8
Rated output	540 hp / 705 lb-ft
Gain	+105 hp / +262 lb-ft
Shipping weight	2 lb

Fitment notes

Fitment is as listed by RennTech for this part number. Your VIN is required with the order.

Fitment

Make	Model	Chassis	Year	Engine
Mercedes-Benz	E 550	W212	2014-2016	4.6L M278 twin-turbo V8

Fitment

Year	Make	Model
2014–2016	Mercedes-Benz	E550

Not sure? Text us your VIN and we’ll confirm.

Shipping & returns

Shipping: Orders ship via UPS, FedEx or USPS, from our facility near Los Angeles or directly from the manufacturer. Rates for many items are weight-based and shown at checkout. If you need it by a certain date, text us before you order.

Returns: Unused items in brand-new condition and original packaging can be returned within 30 days of the invoice date, with a 25% restocking fee unless otherwise specified. In some cases we can offer a lower fee with the balance as store credit. Shipping charges aren't refundable in either direction unless approved by AutoTalent.

Not returnable: special-order or custom items, and anything that has been installed, modified or altered.

Cancellations: free if the item is out of stock or we miss the ETA you agreed to. Other cancellations carry a 5% processing fee to cover card fees we can't recover. Special-order items can't be cancelled.

Damaged in transit? Report it to the carrier and to us within 48 hours, keep all packaging, and don't send anything back without our written approval.

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