- CLS 257 Type Cls53 3.0L Vin 6B 6Th And 7Th Digits 2021, 2020, 2019
Mercedes CLS 257 Type, CLS53 (3.0L, VIN 6B, 6th and 7th digits) 3.0L Engine (2019-2021)
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- 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
Mercedes-AMG CLS53 (C257) Engine For 2019-2021 Models
This cutting-edge 429 HP mild hybrid inline-6 engine delivers breathtaking performance for your Mercedes-AMG CLS53, combining electrified technology with AMG's legendary power.
Engine Specifications:
| Category | Details |
|---|---|
| Engine Code | M256 E30 |
| Displacement | 3.0L inline-6 |
| Aspiration | Turbocharged |
| Horsepower | 429 HP |
| Torque | 384 lb-ft |
| Electric Boost | 21 HP / 184 lb-ft |
| Fuel System | Direct Injection |
| Valvetrain | DOHC 24-valve |
| VIN Requirements | 6th digit = 6, 7th digit = B |
| Transmission | 9-Speed AMG SPEEDSHIFT TCT |
| Drivetrain | 4MATIC+ AWD |
| Engine Block | Aluminum alloy block and head |
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 miles | $ 16,510.00 | Like-new condition, minimal wear |
| 30K-60K miles | $ 13,257.40 | Excellent condition, well maintained |
| 60K-90K miles | $ 12,220.00 | Good condition, fully functional |
| 90K-120K miles | $ 11,700.00 | Budget option, may require service |
Shipping Information:
Standard shipping 5-7 business days.
Expedited shipping available for extra cost.
Frequently Asked Questions?
Q: How do I confirm my CLS53 has the M256 engine?
A: Check the 6th and 7th digits of your VIN they must be 6B for the CLS53. Also verify AMG badging and the presence of EQ Boost technology.
Q: What maintenance is critical for this mild hybrid engine?
A: For the Mercedes CLS53 mild hybrid engine, key maintenance includes regular oil changes, checking the battery and electrical parts, and keeping the cooling system in good shape. This keeps the engine running strong and the hybrid system efficient.
Q: What are common issues with the M256 engine?
A: The Mercedes M256 engine in the CLS53 may have timing chain wear causing ticking sounds, electric compressor problems lowering boost, oil leaks, and hybrid battery issues. Fixing these early keeps the engine strong and reliable.
Ready to Order?
Experience the revolutionary performance of your Mercedes-AMG CLS53 with a quality replacement M256 mild hybrid engine. Order now to restore your four-door coupe cutting-edge performance and technology!
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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