Collection: Used Mercedes Engines For Sale

Browse Mercedes Engines by Year

Pick your model year for VIN-matched 2018 or 2017 inventory. More year pages coming online weekly — if your year is not yet linked, text us your VIN and we will match you.

Mercedes Engines We Cover

Real engines from our warehouse, tested and ready to ship. Our Mercedes inventory spans every major engine family Mercedes has produced for the U.S. market.

M276 3.5L V6 (C/E/GLE/S)

C350, E350, GLE350, S350, ML350 (2011-2018). Modern DOHC V6 with direct injection — replaced M272. Widely available, reliable. Check timing chain guides on high-mileage units.

M272 3.5L V6 (older C/E/ML)

C350, E350, ML350 (2005-2011). SLS-related V6 — SUBJECT TO BALANCE SHAFT GEAR WEAR on 2005-2008 build dates. Verify build date and balance shaft condition before purchase.

M273 4.7L / 5.5L V8

E500, S500/550, ML500/550, GL500 (2005-2013). DOHC V8 — SUBJECT TO BALANCE SHAFT GEAR WEAR on early build dates (same issue as M272). Confirm balance shaft status.

M278 4.7L V8 Twin-Turbo

S550, CL550, GL550, GLE550 (2012+). Modern biturbo V8 — first Mercedes V8 with turbos on the volume side. Verify turbo actuator condition on 100K+ units.

M177 4.0L V8 Twin-Turbo AMG

AMG C63 (2015+), E63, GT, GLE63. Hot-V biturbo V8 with turbos inside the vee — flagship AMG performance V8. Track-abuse verification is critical.

M256 3.0L I6 Turbo Mild-Hybrid

S450, E450, CLS450, GLE450, GLS450 (2018+). Return of the Mercedes inline-six — EQ Boost 48V mild hybrid with integrated starter-alternator. Must match 48V system by year.

OM642 3.0L V6 BlueTEC Diesel

E320/350 BlueTEC, ML320/350 BlueTEC, GL320/350 BlueTEC, Sprinter (2007-2018). Torque-rich V6 turbodiesel — oil cooler leak and turbo oil feed line failure are the two documented wear items.

M156 6.2L V8 AMG (NA)

AMG C63 (2008-2014), E63, CLS63, SL63, ML63 (2007-2015). Naturally-aspirated flat-plane-crank AMG V8 — iconic. Head bolt corrosion + camshaft adjuster failure are documented. Verify service history.

M133 2.0L Turbo I4 AMG

AMG A45, CLA45, GLA45 (2013-2019). Highest-output production 2.0T in the world at launch (355+ hp). Enthusiast-driven — verify turbo condition and any tuning history.

M254 2.0L Turbo Mild-Hybrid

C300, E350, GLC300 (2021+). Modern 2.0T with 48V mild hybrid system integrated — turbo, alternator-starter, and belt-drive all part of the powertrain. Year-locked.

M112 / M113 (older V6 / V8)

Older E320/E430 (M112 2.6/3.2/3.7 V6), older E500/S500 (M113 4.3/5.0 V8). 1997-2005 pre-BlueTEC generation — SOHC 3-valve heads, proven and durable. Tested and warrantied.

More Mercedes Engines

Plus OM651 2.1L 4-cyl diesel (C/E-Class), OM606 legendary 6-cyl diesel (older E-Class), M270 1.6L/2.0L Turbo (C-Class, GLA), and the OM651 Sprinter variants — text us your VIN.

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Why Buy a Used Mercedes Engine from Auto Power Source

Mercedes-Benz operates one of the most diverse engine catalogs in the industry, spanning inline-fours (M133, M254, M270), V6 gas (M272, M276), inline-six (M256 with EQ Boost), V8 (M113, M273, M278), AMG performance (M156 6.2L NA, M177 4.0L biturbo), and diesel (OM642 V6, OM651 4-cyl, OM606 legend). Within that catalog, the M272 3.5L V6 and M273 5.5L V8 (2005-2008 build dates) both have a documented balance shaft gear wear issue — an important verification for any purchase of those engines from that era. The OM642 3.0L V6 diesel is one of the best-supported used units in our inventory but has two known wear items: the oil cooler seal and the turbo oil feed line.

Every Mercedes engine we sell has been pulled from a low-mileage donor vehicle, cataloged by VIN, and held in our climate-controlled warehouse pending sale. Each unit went through our six-step inspection — VIN-matching, ASE testing, noise & smoke verification, full visual inspection, multi-angle photography, and palletized shipping. For M272/M273 units we specifically verify balance shaft condition against build date. For OM642 diesels we inspect the oil cooler seal and turbo oil feed line. For M177 AMG biturbo V8s we verify turbo condition and check for any track-abuse history.

You pay a fraction of Mercedes dealer pricing for identical Mercedes engineering, ship free on a heavy-duty pallet anywhere in the continental U.S., and get 30 days from delivery to return — no restocking fees. Up to a 3-year warranty covers you if anything goes wrong after install. Across 100,000+ Engines+Transmissions In Stock, we hold a 0% fitment-related return rate.

Your Mercedes Engine Options: Compared

Most Mercedes owners face four real choices when their engine fails:

Tested used OEM hits the sweet spot — same engineering as new, fraction of the cost.

Mercedes Engine Buying Guide

Five things to verify before buying a used Mercedes engine:

1. M272 3.5L V6 & M273 V8: verify balance shaft gear on 2005-2008 build dates. The M272 (C350/E350/ML350) and M273 (E500/S500/ML500) both use a balance shaft with a plastic sprocket that wears on early build dates (roughly VIN production before mid-2008). Symptoms: check-engine code P0016/P0017 (camshaft correlation), rough idle. We inspect balance shaft condition on every M272/M273 in inventory and disclose findings before sale.
2. OM642 3.0L V6 diesel: oil cooler seal and turbo oil feed are the wear items. The OM642 (E320/350 BlueTEC, ML320/350, GL320/350, Sprinter) is a proven engine but the oil cooler seal is documented to fail past 100K miles, and the turbo oil feed line collapses over time. Both are relatively inexpensive to replace with the engine out. We inspect both on every OM642 before sale.
3. M156 6.2L V8 AMG: head bolt corrosion + camshaft adjuster history is required. The naturally-aspirated 6.2L AMG V8 (2008-2015 C63, E63, ML63, SL63) has two documented issues: head bolt corrosion at the aluminum-to-steel interface (particularly in road-salt regions), and camshaft adjuster failure. Both were subject to Mercedes-issued technical service bulletins. We verify service history and inspect both before listing.
4. M177 4.0L AMG biturbo: verify no track abuse. The hot-V M177 (AMG C63, E63, GT, GLE63) is a high-performance long-block that sees hard use in enthusiast hands. Turbos are inside the V-valley and can suffer from heat soak on aggressive drivers. We inspect turbo condition, check for any tuning history via ECU data, and verify oil-change intervals against the donor VIN.
5. M256 EQ Boost inline-six is year-locked to its 48V system. The 2018+ M256 3.0L inline-six (S450, E450, CLS450, GLE450, GLS450) uses a 48V mild hybrid system with integrated starter-alternator (ISG). You cannot mix a 2019 M256 into a 2022 chassis without also swapping the 48V electronics. Match donor year to your vehicle exactly.

Our ASE-certified technicians verify every one of these points against your VIN before any engine ships.

Learn More: Mercedes Engine Guides

Practical guides from our team — how to install a used Mercedes engine, what to check on delivery, and what really matters when buying online.

APS Preinstallation Guide

Step-by-step guide to properly installing a used engine — what to inspect, prep, and torque before first start.

Post-Install Maintenance Checklist

Keep your used engine running like new — the break-in period, oil intervals, and warning signs to watch for.

5 Things to Know Before Buying

Warranty terms, VIN matching, mileage, testing, return policy — the checklist every buyer should run through.

After Delivery: Inspection Guide

What to check the moment your engine arrives — freight damage, matching numbers, and what to photograph.

Frequently Asked Questions

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