RENNtech HHT ECU Upgrade 417HP/453LB-FT | 5.8L V12 | M137 | C215 for Mercedes-Benz CL 600 2000-2002
RENNtech M137 V12 ECU Upgrades are TÜV approved!
Our proprietary ECU upgrade for the Mercedes M137 engine offers huge gains in performance across the entire RPM range without sacrificing around town comfort or daily driver reliability.
Our ECU tune offers the biggest performance gains on the market with our dyno results increasing performance from 362 HP and 390 lb/ft torque, up to an astonishing 427 HP and 453 lb/ft at the crank!
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CL 600 (C215 - M137 5.8L V12 Engine) Stock Performance:
- 362 hp @ 4,900-5,500 RPM; 390 lb-ft @ 1,900-4,000 RPM
- Note: Mercedes M137 engine performance when measured obtains higher numbers that rated from factory.
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CL 600 (C215 - M137Â 5.8L V12 Engine)Â Modified Performance:
- 417 hp @ 5,100 RPM; 446 lb-ft @ 4,000 RPM
Vehicle Fitment Chart:
| MAKE |
MODEL |
YEAR |
Mercedes-Benz
|
CL 600
|
2000-2002
|
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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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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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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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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