{"title":"CLK 500 - 209","description":"","products":[{"product_id":"renntech-ecu-hand-held-tuner-hht-for-clk-500-c209-320-hp-355-lb-ft","title":"RENNtech ECU Hand Held Tuner (HHT) for CLK 500 C209 | 320 HP \/ 355 LB-FT | MY2003-2006","description":"\u003cp\u003e\u003cstrong\u003eRENNtech ECU HHT (HandHeldTuner) for the 209 - CLK 500. Up to 320HP and 339 LB-FT LB-FT.\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eGains: +18HP \u0026amp; +16LB-FT.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eRENNtech HHT (hand held tuner) allows you the unlimited ability to switch between tuned and stock ECU programming and requires no ECU removal!\u003c\/p\u003e\n\u003cp\u003eOur 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.\u003c\/p\u003e\n\u003cp\u003eThe RENNtech tuning software for Mercedes offers significant gains in horsepower and torque across the vehicles entire power band. By modifying ignition timing and throttle mapping, optimizing air\/ fuel ratios, increasing the engines rev limiter and modifying boost mapping for turbo charged vehicles, RENNtech performance software unleashes your Mercedes true potential.\u003c\/p\u003e\n\u003cp\u003eRENNtech has been at the forefront of ECU tuning since electronic engine management started to show up in vehicles during the mid 1980's! 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.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCLK 500 (C209) Stock Performance:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e302 HP @ 5600 RPM; 339 LB-FT @ 2700-4250 RPM\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eGains:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e320 HP @ 5600 RPM; 355 LB-FT @ 3000-4600 RPM\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003ciframe style=\"display: block; margin-left: auto; margin-right: auto;\" title=\"YouTube video player\" src=\"https:\/\/www.youtube-nocookie.com\/embed\/dGTikm51Bd4?si=GRIMfE-PW-44O9Fh\" height=\"315\" width=\"560\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e","brand":"RENNtech Inc","offers":[{"title":"Default Title","offer_id":46632614592768,"sku":"54.209.CLK500","price":1195.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/9972\/5312\/files\/renntech_hht_0025_2.jpg?v=1746204255"},{"product_id":"mercedes-722-6-five-speed-transmission-upgrade-for-v8","title":"Mercedes 722.6 Five Speed Transmission Upgrade for V8","description":"\u003cp\u003e\u003cstrong\u003eRENNtech Transmission Upgrade for 722.6 Mercedes Five Speed Transmissions for V8.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eWith increased engine performance it becomes necessary to further improve the drive line components, most importantly the transmission in order to ensure maximum power is transmitted to the drive wheels without transmission slippage. This can not be realized with software and only truly be accomplished by an internal mechanical upgrade to the transmission hardware. RENNtech is the foremost authority on transmission upgrades and has done countless rebuild and upgrades for the most demanding dealers and clients for over 21 years.\u003c\/p\u003e\n\u003cp\u003eOur transmission upgrade consists of a mechanical upgrade to the transmission clutch packs. This allows us the ability to maximize the amount of friction materials contained within the transmission and in turn, the amount of power which can be transmitted through each forward gear. During final assembly the transmission also receives all new gaskets, seals, o-rings, electrical connectors as well as a new transmission pan filter.\u003c\/p\u003e\n\u003cp\u003eOur upgrade leads to improved shift response, shift timing, increased torque handling capabilities and greater drivability under extreme conditions without sacrificing around town comfort.\u003c\/p\u003e\n\u003cp\u003e722.6 Five speed Mercedes Transmissions for V8\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRENNtech Transmission Upgrades can only be performed at the RENNtech HQ in Stuart, FL. Removal, Upgrade and Installation have to be performed In-House.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"RENNtech Inc","offers":[{"title":"Default Title","offer_id":46902426763520,"sku":"27.722.6.V8","price":3690.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/9972\/5312\/files\/RENNtech_722_6_five_speed_upgrade_0ab5199a-35f4-4515-94c3-fffe3f61c7c7.jpg?v=1754991297"},{"product_id":"renntech-stainless-steel-headers-for-clk-55-c208","title":"RENNtech Stainless Steel Headers for CLK 55 (C208)","description":"\u003cp\u003e\u003cstrong\u003eRENNtech Stainless Steel Exhaust Headers for M113 - 55 AMG Engines.\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eGaines: +15HP \u0026amp; 20TQ\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eRENNTECH stainless steel and ceramic-coated exhaust headers offer true bolt-on installation, mounting directly to the OE down pipes - and all RENNTECH headers are hand built from mandrel-bent, seamless tubing and CNC machined stainless flanges.\u003c\/p\u003e\n\u003cp\u003eAdvanced computer aided design (CAD) and flow-analysis software allows RENNTECH headers to deliver substantial gains across the entire RPM range\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRENNtech headers are constructed of the highest quality T-304 stainless steel and are ceramic coated to further reduce latent heat in the engine compartment as well as combat against thermal stress.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eGains:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e+15 HP \u0026amp; +20 TQ\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"RENNtech Inc","offers":[{"title":"Default Title","offer_id":46917442568448,"sku":"49.113.0360","price":3490.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/9972\/5312\/files\/RENNtech_m113_header_clk_55_001_a4d3d503-0d5c-4646-b245-298609a3c5e0.jpg?v=1755274028"},{"product_id":"r1-performance-package-c209-clk-500-325-hp-365-lb-ft-5-0l-na-v8-m113","title":"R1 Performance Package | C209 | CLK 500 | 325 HP \/ 365 LB-FT | 5.0L NA V8 | M113","description":"\u003cp\u003e\u003cstrong\u003eR1 Performance Package for 209 - CLK 500. 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