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Home › Browse Parts › 12-15 MERCEDES GL350 ML350 S350 (W166 X166 W221) 3.0L DIESEL LEFT CYLINDER HEAD

7 detailed photos of the actual item — this exact part is what ships.

From donor vehicle 2014 Mercedes ML350 (stock AA0939).

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2014 Mercedes ML350

12-15 MERCEDES GL350 ML350 S350 (W166 X166 W221) 3.0L DIESEL LEFT CYLINDER HEAD

$257.20 List $270.74
✓ FREE SHIPPING — LOWER 48 + DC

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Order now and your order ships tomorrow — same-day shipping when ordered by 11 AM Pacific on a business day.

Estimated arrival: Monday, July 20 to Friday, July 24 — it's common for this to vary by a day or two.

Genuine OEM — exact item pictured. The photos show the actual factory-original part you’ll receive — inspected, cleaned, and carefully packed.

What you see is exactly what you get

No stock photos, ever. Every listing shows the actual part that will ship to you — already pulled and cleaned — so you can confirm it's exactly what you need, in the condition you expect, before you buy. All backed by a free 90-day warranty and hassle-free returns.

Free 90-day warranty + hassle-free returns

Wrong part? Changed your mind? For eligible lower-48 + DC orders, returns are on us for ANY reason — hit the Contact Viking button for a prepaid label. Refunds are always cash to your payment method, never store credit.

Same-business-day shipping

We ship same business day if ordered before 11 AM Pacific — every part is already pulled, cleaned, and on the shelf, not buried in a car in the yard.

Free shipping (lower 48 + DC)

For eligible destinations, the checkout math stays calm: the listed direct price is the price that ships.

ASE-tested big stuff

Engines and transmissions are tested by our ASE Master Mechanic before listing.

Viking Item ID 106585

Does this fit my vehicle?

Paste your 17-character VIN — it’s on your registration, insurance card, or the driver’s-door jamb.

We verify factory/OEM fitment only — upgrades, retrofits, and custom applications may need parts or coding we can’t verify or guarantee.

We should double-check this one for your 2006 Land Rover Range Rover Sport. It doesn’t show as a direct match in our fitment data — that can just mean a trim/option difference. Send us your VIN below and a real person will verify it for free before you buy.

★ Save this vehicle to My Garage — skip the VIN next time.

Item Specifics

Donor vehicle
2014 Mercedes ML350
Donor VIN
4JGDA2EB6EA338908
Donor miles
244,415
Part number (OEM)
6420100321
Interchange #
306-59425
Brand
Mercedes (Genuine OEM)
Stock #
AA0939
Viking Item ID
106585

LH 3.0LTD, 642.826, LEFT, CYLINDER HEAD, 6420100321

  • ✓These photos show the exact individual part you'll receive — no stock photos
  • ✓Genuine OEM — factory-original parts
  • ✓Inspected before listing — engines & transmissions tested by an ASE Master Mechanic
  • ✓FREE 90-day warranty & 90-day any-reason returns — we cover return shipping for eligible lower-48 + DC orders, freight included (details)
  • ✓Order by 11 AM Pacific on a business day — ships that same day (holidays excluded)
  • ✓Want longer coverage? Extended warranties to 180 or 365 days — see options
Ask about this part / verify fitment — free, no pressure

Compatible Vehicles (56)

Verified Hollander interchange fitment — the same stickered, tracked compatibility data our listing crew uses. Scroll inside the table; no page-flipping. Not sure? Use the VIN check above and we’ll confirm.

YearMakeModelTrimEngineNotes
2013 Mercedes-Benz GL350 Bluetec 4Matic Sport Utility 4-Door 3.0L 2987CC V6 DIESEL DOHC Turbocharged 166 TYPE, GL350, LH
2014 Mercedes-Benz GL350 Bluetec 4Matic Sport Utility 4-Door 3.0L 2987CC V6 DIESEL DOHC Turbocharged 166 TYPE, GL350, LH
2015 Mercedes-Benz GL350 Bluetec 4Matic Sport Utility 4-Door 3.0L 2987CC V6 DIESEL DOHC Turbocharged 166 TYPE, GL350, LH
2013 Mercedes-Benz GL450 4Matic Sport Utility 4-Door 4.7L 4663CC 285Cu. In. V8 GAS DOHC Turbocharged 166 TYPE, GL350, LH
2013 Mercedes-Benz GL450 Base Sport Utility 4-Door 4.7L 4663CC 285Cu. In. V8 GAS DOHC Turbocharged 166 TYPE, GL350, LH
2014 Mercedes-Benz GL450 Base Sport Utility 4-Door 4.7L 4663CC 285Cu. In. V8 GAS DOHC Turbocharged 166 TYPE, GL350, LH
2015 Mercedes-Benz GL450 4Matic Sport Utility 4-Door 3.0L 2996CC V6 GAS DOHC Turbocharged 166 TYPE, GL350, LH
2013 Mercedes-Benz GL550 4Matic Sport Utility 4-Door 4.7L 4663CC 285Cu. In. V8 GAS DOHC Turbocharged 166 TYPE, GL350, LH
2014 Mercedes-Benz GL550 4Matic Sport Utility 4-Door 4.7L 4663CC 285Cu. In. V8 GAS DOHC Turbocharged 166 TYPE, GL350, LH
2015 Mercedes-Benz GL550 4Matic Sport Utility 4-Door 4.7L 4663CC 285Cu. In. V8 GAS DOHC Turbocharged 166 TYPE, GL350, LH
2013 Mercedes-Benz GL63 AMG Base Sport Utility 4-Door 5.5L 5461CC 333Cu. In. V8 GAS DOHC Turbocharged 166 TYPE, GL350, LH
2014 Mercedes-Benz GL63 AMG Base Sport Utility 4-Door 5.5L 5461CC 333Cu. In. V8 GAS DOHC Turbocharged 166 TYPE, GL350, LH
2015 Mercedes-Benz GL63 AMG Base Sport Utility 4-Door 5.5L 5461CC 333Cu. In. V8 GAS DOHC Turbocharged 166 TYPE, GL350, LH
2015 Mercedes-Benz ML250 Bluetec 4Matic Sport Utility 4-Door 2.1L 2143CC 131Cu. In. l4 DIESEL DOHC Turbocharged 166 TYPE, ML350, DIESEL ENGINE, LH
2012 Mercedes-Benz ML350 4Matic Sport Utility 4-Door 3.5L 3498CC V6 FLEX DOHC Naturally Aspirated 166 TYPE, ML350, DIESEL, LH
2012 Mercedes-Benz ML350 Bluetec 4Matic Sport Utility 4-Door 3.0L 2987CC V6 DIESEL DOHC Turbocharged 166 TYPE, ML350, DIESEL, LH
2013 Mercedes-Benz ML350 4Matic Sport Utility 4-Door 3.5L 3498CC V6 FLEX DOHC Naturally Aspirated 166 TYPE, ML350, DIESEL, LH
2013 Mercedes-Benz ML350 Bluetec 4Matic Sport Utility 4-Door 3.0L 2987CC V6 DIESEL DOHC Turbocharged 166 TYPE, ML350, DIESEL, LH
2014 Mercedes-Benz ML350 4Matic Sport Utility 4-Door 3.5L 3498CC V6 FLEX DOHC Naturally Aspirated 166 TYPE, ML350, DIESEL ENGINE, LH
2014 Mercedes-Benz ML350 Bluetec 4Matic Sport Utility 4-Door 3.0L 2987CC V6 DIESEL DOHC Turbocharged 166 TYPE, ML350, DIESEL ENGINE, LH
2015 Mercedes-Benz ML350 4Matic Sport Utility 4-Door 3.5L 3498CC V6 FLEX DOHC Naturally Aspirated 166 TYPE, ML350, DIESEL ENGINE, LH
2015 Mercedes-Benz ML350 Bluetec 4Matic Sport Utility 4-Door 3.0L 2987CC V6 DIESEL DOHC Turbocharged 166 TYPE, ML350, DIESEL ENGINE, LH
2012 Mercedes-Benz S350 Base Sedan 4-Door 3.5L 3498CC 213Cu. In. V6 GAS DOHC Naturally Aspirated 221 TYPE, S350, LH
2012 Mercedes-Benz S350 Bluetec 4Matic Sedan 4-Door 3.0L 2987CC V6 DIESEL DOHC Turbocharged 221 TYPE, S350, LH
2013 Mercedes-Benz S350 Base Sedan 4-Door 3.5L 3498CC 213Cu. In. V6 GAS DOHC Naturally Aspirated 221 TYPE, S350, LH
2013 Mercedes-Benz S350 Bluetec 4Matic Sedan 4-Door 3.0L 2987CC V6 DIESEL DOHC Turbocharged 221 TYPE, S350, LH
2012 Mercedes-Benz S400 Hybrid Sedan 4-Door 3.5L 3498CC V6 FULL HYBRID EV-GAS (FHEV) DOHC Naturally Aspirated 221 TYPE, S350, LH
2013 Mercedes-Benz S400 Hybrid Sedan 4-Door 3.5L 3498CC V6 FULL HYBRID EV-GAS (FHEV) DOHC Naturally Aspirated 221 TYPE, S350, LH
2013 Mercedes-Benz S500 4Matic Coupe 2-Door 4.7L 4663CC 285Cu. In. V8 GAS DOHC Turbocharged 221 TYPE, S350, LH
2013 Mercedes-Benz S500 Base Sedan 4-Door 4.7L 4663CC 285Cu. In. V8 GAS DOHC Turbocharged 221 TYPE, S350, LH
2012 Mercedes-Benz S550 4Matic Sedan 4-Door 4.7L 4663CC 285Cu. In. V8 GAS DOHC Turbocharged 221 TYPE, S350, LH
2012 Mercedes-Benz S550 Base Sedan 4-Door 4.7L 4663CC 285Cu. In. V8 GAS DOHC Turbocharged 221 TYPE, S350, LH
2013 Mercedes-Benz S550 4Matic Sedan 4-Door 4.7L 4663CC 285Cu. In. V8 GAS DOHC Turbocharged 221 TYPE, S350, LH
2013 Mercedes-Benz S550 Base Sedan 4-Door 4.7L 4663CC 285Cu. In. V8 GAS DOHC Turbocharged 221 TYPE, S350, LH
2012 Mercedes-Benz S600 Base Sedan 4-Door 5.5L 5513CC 336Cu. In. V12 GAS SOHC Turbocharged 221 TYPE, S350, LH
2013 Mercedes-Benz S600 Base Sedan 4-Door 5.5L 5513CC 336Cu. In. V12 GAS SOHC Turbocharged 221 TYPE, S350, LH
2012 Mercedes-Benz S63 AMG Base Sedan 4-Door 5.5L 5461CC 333Cu. In. V8 GAS DOHC Turbocharged 221 TYPE, S350, LH
2012 Mercedes-Benz S63 AMG Base Sedan 4-Door 6.0L 5980CC 365Cu. In. V12 GAS SOHC Turbocharged 221 TYPE, S350, LH
2012 Mercedes-Benz S63 AMG Base Sedan 4-Door 6.2L 6208CC 379Cu. In. V8 GAS DOHC Turbocharged 221 TYPE, S350, LH
2013 Mercedes-Benz S63 AMG Base Sedan 4-Door 5.5L 5461CC 333Cu. In. V8 GAS DOHC Turbocharged 221 TYPE, S350, LH
2013 Mercedes-Benz S63 AMG Base Sedan 4-Door 6.2L 6208CC 379Cu. In. V8 GAS DOHC Turbocharged 221 TYPE, S350, LH
2012 Mercedes-Benz S65 AMG Base Sedan 4-Door 6.0L 5980CC 365Cu. In. V12 GAS SOHC Turbocharged 221 TYPE, S350, LH
2013 Mercedes-Benz S65 AMG Base Sedan 4-Door 6.0L 5980CC 365Cu. In. V12 GAS SOHC Turbocharged 221 TYPE, S350, LH
2012 Mercedes-Benz SL500 Base Convertible 2-Door 5.5L 5461CC 333Cu. In. V8 GAS DOHC Naturally Aspirated 221 TYPE, S350, LH
2013 Mercedes-Benz SL500 Base Convertible 2-Door 4.7L 4663CC 285Cu. In. V8 GAS DOHC Turbocharged 221 TYPE, S350, LH
2012 Mercedes-Benz SL550 Avantgarde Convertible 2-Door 5.5L 5461CC 333Cu. In. V8 GAS DOHC Naturally Aspirated 221 TYPE, S350, LH
2012 Mercedes-Benz SL550 Base Convertible 2-Door 5.5L 5461CC 333Cu. In. V8 GAS DOHC Naturally Aspirated 221 TYPE, S350, LH
2012 Mercedes-Benz SL550 Grand Edition Convertible 2-Door 5.5L 5461CC 333Cu. In. V8 GAS DOHC Naturally Aspirated 221 TYPE, S350, LH
2013 Mercedes-Benz SL550 Base Convertible 2-Door 4.7L 4663CC 285Cu. In. V8 GAS DOHC Turbocharged 221 TYPE, S350, LH
2012 Mercedes-Benz SL600 Base Convertible 2-Door 5.5L 5513CC 336Cu. In. V12 GAS SOHC Turbocharged 221 TYPE, S350, LH
2012 Mercedes-Benz SL63 AMG Avantgarde Convertible 2-Door 6.3L 6208CC V8 GAS DOHC Naturally Aspirated 221 TYPE, S350, LH
2012 Mercedes-Benz SL63 AMG Base Convertible 2-Door 6.0L 5980CC 365Cu. In. V12 GAS SOHC Turbocharged 221 TYPE, S350, LH
2012 Mercedes-Benz SL63 AMG Base Convertible 2-Door 6.3L 6208CC V8 GAS DOHC Naturally Aspirated 221 TYPE, S350, LH
2013 Mercedes-Benz SL63 AMG Base Convertible 2-Door 5.5L 5461CC 333Cu. In. V8 GAS DOHC Turbocharged 221 TYPE, S350, LH
2012 Mercedes-Benz SL65 AMG Base Convertible 2-Door 6.0L 5980CC 365Cu. In. V12 GAS SOHC Turbocharged 221 TYPE, S350, LH
2013 Mercedes-Benz SL65 AMG Base Convertible 2-Door 6.0L 5980CC 365Cu. In. V12 GAS SOHC Turbocharged 221 TYPE, S350, LH