{"product_id":"m278-billet-polyurethane-engine-mounts-e550-cls550","title":"M278 Billet Polyurethane Engine Mounts – E550 \/ CLS550","description":"\u003cdiv style=\"font-family: Arial, sans-serif; max-width: 880px; margin: auto; padding: 22px; border: 1px solid #e5e7eb; background: #fafafa; color: #1a1a1a; line-height: 1.7; border-radius: 10px;\"\u003e\n\u003c!-- TITLE \/ HOOK --\u003e\n\u003ch1 style=\"text-align: center; font-size: 26px; margin: 0 0 8px; color: #0b3b60;\"\u003eBillet \/ Polyurethane Engine Mounts for Mercedes M278 (W212 \/ W218)\u003c\/h1\u003e\n\u003cp style=\"text-align: center; margin: 0 0 18px; color: #475569;\"\u003eReduce drivetrain motion • Sharpen throttle response • Improve power delivery\u003c\/p\u003e\n\u003c!-- INTRO --\u003e\n\u003cp\u003eUpgrade your \u003cstrong\u003eMercedes-Benz M278 4.7L BiTurbo\u003c\/strong\u003e with our \u003cstrong\u003eBillet \/ Polyurethane Engine Mounts\u003c\/strong\u003e. Designed specifically for the \u003cstrong\u003eW212 E 550\u003c\/strong\u003e and \u003cstrong\u003eW218 CLS 550\u003c\/strong\u003e, these mounts deliver superior engine control, sharper response, and consistent power transfer under load — ideal for tuned or spiritedly driven 550 builds.\u003c\/p\u003e\n\u003cp\u003eFactory fluid-filled mounts on M278 cars \u003cstrong\u003esag, leak, and collapse with age\u003c\/strong\u003e, especially on tuned cars or those driven hard. The result is excess engine movement, sloppy shifts, and vibration under throttle. These billet\/poly mounts eliminate that failure point with a rigid housing and high-durometer insert that keep everything locked in place.\u003c\/p\u003e\n\u003c!-- KEY BENEFITS --\u003e\n\u003ch2 style=\"color: #0b3b60; margin-top: 18px;\"\u003e⚙️ Key Benefits\u003c\/h2\u003e\n\u003cul style=\"margin-left: 20px;\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eStability \u0026amp; Control:\u003c\/strong\u003e Reduces engine movement and drivetrain lash for sharper throttle response and cleaner shifts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurable by Design:\u003c\/strong\u003e Billet aluminum housings and high-durometer polyurethane resist heat, oil, and deformation far better than OEM fluid-filled mounts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImproved Torque Transfer:\u003c\/strong\u003e Keeps the drivetrain aligned under boost so more of the M278’s torque reaches the rear wheels.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConsistent Geometry:\u003c\/strong\u003e Prevents the front end from “sagging” as mounts age, helping maintain proper driveline and exhaust alignment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDirect-Fit Upgrade:\u003c\/strong\u003e Engineered around factory mount geometry for a precise, bolt-in installation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- FITMENT --\u003e\n\u003ch2 style=\"color: #0b3b60; margin-top: 22px;\"\u003e✅ Vehicle Fitment — M278 (W212 \/ W218)\u003c\/h2\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; font-size: 15px; margin-top: 8px;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"background: #0b3b60; color: #fff;\"\u003e\n\u003cth style=\"padding: 10px; border: 1px solid #e5e7eb; text-align: left;\"\u003eModel\u003c\/th\u003e\n\u003cth style=\"padding: 10px; border: 1px solid #e5e7eb; text-align: left;\"\u003eEngine\u003c\/th\u003e\n\u003cth style=\"padding: 10px; border: 1px solid #e5e7eb; text-align: left;\"\u003eYears\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background: #f1f5f9;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e5e7eb;\"\u003eE 550 (W212)\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e5e7eb;\"\u003eM278 4.7L BiTurbo\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e5e7eb;\"\u003e2012–2016\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e5e7eb;\"\u003eCLS 550 (W218)\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e5e7eb;\"\u003eM278 4.7L BiTurbo\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e5e7eb;\"\u003e2012–2018\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp style=\"font-size: 13px; color: #64748b; margin-top: 8px;\"\u003e\u003cem\u003eFitment is exclusive to the W212 and W218 M278 platforms. Contact us with your VIN if you’re unsure.\u003c\/em\u003e\u003c\/p\u003e\n\u003c!-- WHAT'S INCLUDED \/ INSTALL --\u003e\n\u003ch2 style=\"color: #0b3b60; margin-top: 22px;\"\u003e📦 What’s Included \u0026amp; Install Notes\u003c\/h2\u003e\n\u003cul style=\"margin-left: 20px;\"\u003e\n\u003cli\u003eLeft + Right \u003cstrong\u003eBillet \/ Polyurethane Engine Mounts\u003c\/strong\u003e for M278 W212\/W218.\u003c\/li\u003e\n\u003cli\u003eReuse the \u003cstrong\u003eOEM top cap\u003c\/strong\u003e (pops off the factory mount with a small screwdriver).\u003c\/li\u003e\n\u003cli\u003eDirect-fit design matches factory geometry for proper drivetrain and exhaust alignment.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"font-size: 14px; color: #475569;\"\u003e\u003cem\u003eProfessional installation recommended. Torque all fasteners to factory specification and verify downpipe, subframe, and steering rack clearance after installation.\u003c\/em\u003e\u003c\/p\u003e\n\u003c!-- FAQ --\u003e\n\u003ch2 style=\"color: #0b3b60; margin-top: 22px;\"\u003e❓ Frequently Asked Questions\u003c\/h2\u003e\n\u003cdetails style=\"margin-bottom: 10px;\"\u003e\n\u003csummary\u003e\u003cstrong\u003eWill these increase NVH?\u003c\/strong\u003e\u003c\/summary\u003e\n\u003cp style=\"margin-top: 6px;\"\u003eCompared to soft OEM fluid-filled mounts, you may notice a slight increase in vibration at idle or low RPM. Under load, most drivers prefer the added precision, improved drivetrain feel, and reduction in “slop” when getting on and off throttle.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 10px;\"\u003e\n\u003csummary\u003e\u003cstrong\u003eAre these mounts suitable for tuned or high-boost M278 cars?\u003c\/strong\u003e\u003c\/summary\u003e\n\u003cp style=\"margin-top: 6px;\"\u003eYes. The billet housings and high-durometer polyurethane inserts are designed to handle the elevated torque, heat, and repeated load cycles typical of tuned W212\/W218 M278 builds.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 10px;\"\u003e\n\u003csummary\u003e\u003cstrong\u003eDo I need new hardware?\u003c\/strong\u003e\u003c\/summary\u003e\n\u003cp style=\"margin-top: 6px;\"\u003eOEM hardware may be reused if it’s in good condition. Replace any stretched, corroded, or damaged bolts and always follow factory torque and angle specs.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003c!-- CTA --\u003e\n\u003cdiv style=\"text-align: center; margin-top: 24px;\"\u003e\u003ca href=\"\/collections\/m278\" style=\"display: inline-block; background: #0b3b60; color: #fff; padding: 12px 22px; border-radius: 8px; text-decoration: none; font-weight: bold;\"\u003e 🔧 Shop M278 Performance Parts \u003c\/a\u003e\u003c\/div\u003e\n\u003c!-- SEO FOOTER LINE --\u003e\n\u003cp style=\"text-align: center; font-size: 13px; color: #64748b; margin-top: 18px;\"\u003ePerformance engine mounts for Mercedes E 550 \u0026amp; CLS 550 — W212 \/ W218 M278 4.7L BiTurbo.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BenzUnited Parts","offers":[{"title":"Default Title","offer_id":46294562242735,"sku":null,"price":495.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0631\/8718\/9935\/files\/billet-polyurethane-engine-mounts-mercedes-m278-e550-cls550-benzunited.jpg?v=1763534145","url":"https:\/\/benzunitedparts.com\/products\/m278-billet-polyurethane-engine-mounts-e550-cls550","provider":"BenzUnited Parts","version":"1.0","type":"link"}