Description:
RennTech HHT (hand held tuner) allows you the unlimited ability to switch between tuned and stock ECU programming and requires no ECU removal. RennTech proprietary tuning module stores both the RennTech tuned file and your vehicles stock file. The module plugs directly into the OBD2 port and delivers the file you choose directly to the ECU. Programming takes only a few minutes and the vehicle can be reflashed at any time as many times as you wish.
RennTech has been at the forefront of ECU tuning since electronic engine management started to show up in vehicles during the mid 1980s! Our experience, countless hours of in-house research, development and exhaustive testing ensure that our proprietary ECU upgrade offers incredible performance gains and rock solid daily driver reliability.
RennTech tuning software for Mercedes offers significant gains in horsepower and torque across the vehicle's entire power band. By modifying ignition timing and throttle mapping, optimizing air-to-fuel ratios, increasing the engine's rev limiter and modifying boost mapping for turbo-charged vehicles, RennTech performance software unleashes the true potential of your Mercedes.
With the RennTech ECU Upgrade the W205 - C 43 AMG Sedan gains up to +25 HP and +42 LB-FT, based on power numbers measured by RennTech. Please note that the Mercedes M276 engine performance when measured obtains higher numbers than rated from factory. The maximum power number reached with the RennTech ECU Upgrade for the W205 - C 43 AMG Sedan is 400 HP and 440 LB-FT.
Attentions:
Mercedes M276 engine performance when measured, obtains higher numbers than rated from factory
Power gains are calculated with stock numbers measured by RENNtech
Crank Performance Numbers are calculated with a 17% Drivetrain loss on 4MATIC vehicles
Our numbers will be dependent on conditions and fuel quality. 91+ Octane gasoline is mandatory with this Performance Package
Features:
- Gains up to +25 HP and +42 LB-FT
- Long-lasting and driver reliability
- Significant gains in horsepower
- Increases the performance
- Significant gains torqueÂ
- Increasing the engine's rev limiter
- Incredible performance gains
Stock Performance:
- 362Â HP @ 5,500-6,000 RPM;Â 384Â LB-FT @ 2,000-4,200 RPM
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375Â HP @ 5,600 RPM;Â 398Â LB-FT @ 3,300-3,600 RPM
Modified Performance:
- 400Â HP @ 5,450 RPM;Â 440Â LB-FT @ 3,250-3,600 RPM
 Vehicle Fitment:  Â
- 2015Â Mercedes-Benz W205 C43 AMGÂ SedanÂ
- 2016Â Mercedes-Benz W205 C43 AMGÂ SedanÂ
- 2017Â Mercedes-Benz W205 C43 AMGÂ SedanÂ
- 2018Â Mercedes-Benz W205 C43 AMGÂ SedanÂ
- 2019Â Mercedes-Benz W205 C43 AMGÂ SedanÂ
Note:
Images are for representation purpose only and may differ depending on application.
⚠️ California Proposition 65 Warning:
This product may expose you to chemicals known to the State of California
to cause cancer or reproductive harm.
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Price Match Guarantee:
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We reward enthusiasts who trust us with their major projects. Use these tiered codes at checkout to apply instant savings to your order:
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Fitment Guarantee:
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Avoid the headache of the wrong part. If you are unsure about compatibility, contact us first. If we verify the fitment for your vehicle via email and it doesn’t fit, we will handle the exchange at no cost to you.
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Leveraging our massive supply chain, we secure hard-to-find components that other shops can't access. Whether it's a standard upgrade or a custom exotic application, we have the network to get it to your door.
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Building something big? If you’re planning a full overhaul or need a custom quote, reach out to our team via our
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Direct Consultation:
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For sales inquiries, help applying Project Incentives, or immediate assistance with a new order:
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Monday – Friday | 9am – 5pm EST
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To qualify for our Fitment Guarantee, please email your vehicle’s Year, Make, Model, and any existing modifications to:
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Our experts will review your specifications and provide written confirmation for your build.
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For tracking updates or status inquiries on existing orders, please reach out via our Contact Form. Having your order number ready will allow us to provide the most efficient update.
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Secure Shipping:
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We offer FREE Ground Shipping within the 48 contiguous United States. Most in-stock orders process within 48 hours. For your security, high-value performance parts require a signature upon delivery to ensure they reach you safely.
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Transit Protection:
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Please inspect your order immediately. Damage must be reported within 48 hours. For freight/LTL items, if you cannot inspect the contents immediately, please write "Subject to Inspection" on the delivery receipt before signing.
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Flexible Returns:
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Unused items in brand-new, original packaging can be returned within 30 days. While standard refunds incur a 25% restocking fee, we will waive this fee entirely if you choose store credit or an exchange for your next upgrade.
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Exclusions:
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To ensure every customer receives brand-new, untampered components, parts that have been installed, modified, or used are non-returnable. Custom builds, special orders, and wheel/tire packages are considered final sale.
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Need assistance? Reach out via our
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Fitment Guarantee
Fitment guides and tools are helpful—but your car is unique! Some trims and options aren’t always listed, so if you want 100% confidence that a part will fit, our team is happy to double-check for you. We take the guesswork out of your purchase by standing behind our expertise.
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Verify Your Build:
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If this product doesn't list your specific vehicle data, simply reach out to support@autohousesupply.com. We will manually verify compatibility for you.
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Our Promise:
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When we confirm a fitment in writing and it doesn’t work for your application, we cover the return shipping and exchange it at no cost to you.
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