- SL Class 231 Type Sl550 2016, 2014, 2015
Mercedes SL Class 231 Type, SL550 - Engine (2014-2016)
4.5 on Trustpilot · 335 reviewsHow ordering works
- 1Enter or confirm your VIN
- 2We verify exact fitment for your vehicle
- 3Flat freight shown up front — no surprises
- 490-day warranty included on every part
- 5We photograph & confirm the unit before it ships
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About this part
Bring Back Your Mercedes-Benz M278 4.7L Biturbo V8 Engine for 2014-2016 R231 SL550 Roadster
Full M278 DE 46 AL engine replacement engineered for high-performance luxury roadsters.
Engine Specifications:
| Category | Details |
|---|---|
| Displacement | 4.7L Biturbo V8 |
| Horsepower | 429 HP |
| Torque | 516 lb-ft |
| Turbochargers | Twin turbochargers |
| Fuel System | Gasoline Direct Injection |
| Block Material | Aluminium block/heads |
Key Features:
Complete Long Block Assembly: Includes the fully assembled engine block, crankshaft, pistons, cylinder head, and valvetrain.
Includes Intake & Exhaust Manifolds: Comes with both manifolds pre-attached, saving installation time.
Backed by Warranty: Provides a reliable warranty on the entire assembly for peace of mind.
Pricing Options:
| Mileage Range | Price | Condition |
|---|---|---|
| 30K-60K miles | $ 14,852.50 | Low-mileage, compression tested |
| 60K-90K miles | $ 12,350.00 | Excellent, minor carbon build-up likely |
| 90K-120K miles | $ 10,496.20 | Good, may need routine service items |
| 120K-150K miles | $ 8,937.50 | Functional, may need pre-installation service |
Shipping Information:
Dimensions: Length 40" × Width 32" × Height 34"
Weight: Approximately 485 lbs
Shipping Options:
Standard shipping 5-7 business days
Expedited shipping Available for an extra cost.
Frequently Asked Questions?
Q: How does this M278 engine differ for the SL550 compared to other Mercedes models?
A: The SL550 engine for the Mercedes SL Class 231 (2014-2016) includes special parts like a unique oil pan and cooling system, plus custom ECU tuning to boost the roadster’s dynamic performance.
Q: Do your engines have warranties?
A: This engine comes with a 60-day warranty. Extended coverage for 6 to 12 months is available upon request.. Reach out to our customer service team to learn more.
Q: Can I reuse my transmission?
A: You can keep your transmission when upgrading to the Mercedes SL Class R231 SL550 engine 2014-2016 if it’s in good shape and matches 7G-Tronic for 2014-2015 or 9G-Tronic for 2016.
Ready to Order?
The Mercedes-Benz SL-Class R231 SL550 (2014-2016) M278 engine is a meticulously crafted replacement built to revive your vehicle’s peak performance and refined luxury. Get in touch today for availability and a tailored quote.
Tested, VIN-matched, and guaranteed
VIN-Verified Fit
We match the part to your vehicle's VIN and confirm exact fitment before we ship — so it fits the first time. Free cancellation within 24 hours.
Works on Arrival, Guaranteed
Every unit is tested before it ships. If it arrives defective, we replace it fast — and in the rare case we can't replace it, you get a full refund.
90-Day Warranty
A real parts-replacement warranty, included — with extended coverage available.
Heavy freight item, shipped fully insured and tracked. Freight is a flat $250 commercial / $400 residential, shown at checkout — no hidden fees, no freight-quote runaround.
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