- Mercedes SL Class 231 Type Sl550 2016, 2014, 2015
2014-2016 Mercedes SL Class Used Engine — SL550, Roadster, 231 chassis
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
What's included with this engine
You're buying a complete engine assembly — not a bare block. Here's exactly what arrives bolted to it, and the handful of accessories your mechanic moves over from your current engine during the install.
Included with your engine
Already assembled — ships as one unit- Long block — fully assembled
- Short block
- Cylinder head
- Crankshaft
- Camshaft
- Pistons
- Intake manifold
- Exhaust manifold
- Oil pan
- Timing cover
Not included — transfer these over
Reused from your current engine- Wiring harness
- Bolt-on accessories
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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.
Want a better price on this part?
Call us before you order — we’ll check if there’s an extra discount available on this exact part for your vehicle. Two minutes, no pressure.
☎ Call (206) 686-6866Ask us about a better price
One quick call and we’ll see if we can get you a better discount on this part. Real specialist, no call center.
☎ Call (206) 686-6866