Used OEM Part · Tested

Mercedes SL Class 222 Type, (Sdn), S550, AWD, US market (VIN G8F, 5th, 6th and 7th digits) - Engine (2016)

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Find your VIN on the driver-side door jamb or lower windshield.
Unit Condition & Specs
AvailabilityIn stock — ready to ship
55% OFF $25,854.40
$11,752.00
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.
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🛡90-Day WarrantyParts replacement
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  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 2016 Mercedes S550 4MATIC Performance with OEM M278 Engine

Bring back your W222 S550's commanding power with our OEM-certified M278 4.7L BiTurbo V8 engine, specifically configured for US-market 4MATIC AWD models.

Engine Specifications:

Category Details
Displacement 4.7L BiTurbo V8
Engine Code M278 DE 46 AL
Horsepower 449 HP 
Torque 516 lb-ft 
Turbochargers Twin IHI RHF55
Block Material Aluminium alloy
Drive System 4MATIC AWD
VIN Identification 5th-7th digits = G8F
 

Compatibility:

2016 Mercedes-Benz S550 

4MATIC AWD Models Only

 VIN Requirements:

  • 5th-7th digits = G8F

  • Engine tag shows M278

Pricing Options:

Mileage Range Price Condition
30K-60K miles $ 11,752.00 Low-mileage, full history
60K-90K miles $ 11,048.70 Excellent, minor wear
90K-120K miles $ 9,815.00 Good, may need gaskets
120K-150K miles $ 9,098.70 Functional, needs seals
 

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.

Shipping Information:

Dimensions: Length 45"× Width 33"× Height 35"

Weight: 490 lbs

Shipping Options:

Standard shipping 5-7 business days

Expedited shipping are available for an extra cost

Frequently Asked Questions?

Q: Does this include both turbochargers?

A: This listing is for the engine of the Mercedes SL Class 222 Type S550 AWD. It does not include both turbochargers; it is focused on the engine itself. For turbocharger details, please check specific listings or contact us directly.

Q:What maintenance is required post-installation?

A: After installing parts on the 2016 Mercedes SL Class 222 S550 AWD with the M278 engine, check that everything works properly. Monitor engine performance and fluid levels regularly. 

Q: How do I verify M278 engine code?

A: To verify the M278 engine code on your Mercedes SL Class 222 Sdn, S550 AWD, US market 2016, locate the Vehicle Identification Number VIN and focus on the 5th, 6th, and 7th digits, which correspond to the engine type.

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Order now to maintain your vehicle’s peak performance and enjoy expert-quality parts tailored to your Mercedes.

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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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