Used OEM Part · Tested

Mercedes SL Class 222 Type, (Sdn), S550, RWD (VIN G8C, 5th, 6th and 7th digits) - Engine (2014-2015)

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Confirm it fits YOUR vehicleEnter your VIN — we verify exact fit before you pay
Find your VIN on the driver-side door jamb or lower windshield.
Unit Condition & Specs
AvailabilityIn stock — ready to ship
55% OFF $28,205.32
$12,820.60
Mileage
✓ Flat-rate freight — insured & tracked ·✓ 90-day warranty included· freight shown at checkout: $250 commercial / $400 residential
Ships within 3 - 5 business days Approx - flat-rate freight, tracked & insured Most orders arrive 5–7 business days after dispatch (US). You get tracking the moment it ships.
Not sure it fits? Call an expert
🛡90-Day WarrantyParts replacement
🚚Flat-Rate FreightDelivered to your door
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How ordering works

  1. 1Enter or confirm your VIN
  2. 2We verify exact fitment for your vehicle
  3. 3Flat freight shown up front — no surprises
  4. 490-day warranty included on every part
  5. 5We photograph & confirm the unit before it ships
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Part details

About this part

Bring Back Your V8 Power Genuine M278 Engine Replacement for Mercedes-Benz S550 W222 2014-2015

Elevate your Mercedes-Benz S-Class W222 with an authentic M278 DE 46 AL engine replacement, meticulously engineered to restore the commanding performance 

Engine Specifications:

Category Details
Displacement 4.7L Biturbo V8
Horsepower 449 HP 
Torque 516 lb-ft 
Turbochargers Twin-turbochargers
Fuel System Gasoline Direct Injection 
Block Material Aluminium block/heads
Transmission Automatic Transmission 7-speed 7G-Tronic
 

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 $ 12,820.60 Low-mileage, rigorously tested
60K-90K miles $ 10,393.50 Excellent, fully inspected
90K-120K miles $ 9,945.00 Good, verified operational status
120K-150K miles $ 8,443.50 Functional, recommended for pre-installation service
 

Shipping Information:

Dimensions: Length 40" × Width 32" × Height 34" 

Weight: Approximately 500 lbs 

Shipping Options:

Standard shipping 5-7 business days 

Fast shipping is available for an additional fee when you need it urgently.                

Frequently Asked Questions?

Q: What is the exact engine code for the 2014-2015 S550 RWD?

A: The engine is identified as M278 DE 46 AL, commonly known as M278.929 in S550 models.

Q: How does this M278 engine compare to the V6 Biturbo in the SL400? 

A: The M278 is a powerful 4.7L V8 biturbo engine delivering 449 HP and 516 lb-ft torque, built to enhance the S550’s performance and luxury.

Q: Do your engines come with warranties?

A: This engine comes with a 60-day warranty. You can also get extended coverage from 6 to 12 months. Get in touch with our team for more info and elevate your driving experience.

Q: Can I reuse my existing transmission with this engine?

A: You can usually keep your 7-speed 7G-Tronic transmission if it’s in good shape and fits the M278 engine. Have a pro check it first to ensure it’s ready to perform.

Ready to Order?

The 2014-2015 Mercedes S550 M278 engine is a precision replacement that brings back your car’s power and luxury. Reach out now to check availability and order our team is ready to help.

Order with confidence

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.

Real photos of the exact unitWhat you see is what ships
A-grade OEM, testedVerified specs, not estimated
VIN-matched to your vehicleConfirmed before dispatch
Shipping & delivery

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.

1Ships within 3 - 5 business days ApproxCarefully packed & dispatched from our US warehouse
2Freight to your doorBrought to your door
3Delivered in 5–7 business daysTracked & insured · tracking sent when it ships
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