Engine Finders

Mercedes-Benz SL Specialists

Expert Solutions for Every SL – SL 280 to SL 65 AMG

Need a reliable replacement engine for your Mercedes-Benz SL?
Engine Finders specializes in SL engines with solutions for M113/M273 V8 and M275 V12 failure patterns across all generations.

Find Your Perfect Mercedes-Benz SL Engine Today!
Mercedes-Benz SL engine replacement specialists | Engine Finders

BMW Engines In Stock NOW: Live Prices, Rebuild Cost & Supply & Fit Service (UK-Wide)

Check REAL-TIME stock availability for all BMW models. View exact rebuild costs, professional engine works & find a certified garage near you - all with 12-month warranty, MoT-ready units, and same-day dispatch.

Mercedes-Benz SL Replacement Engines Options - Verified Units (UK Supply)

All engines bench-tested, VAT-inclusive, with 12-month warranty. MoT-compliant. Nationwide delivery. Direct OEM fitment for R230, R231.

Mercedes-Benz SL Rebuilt Engines

Includes updated M273/M278 timing chains to prevent common V8 failures.

Mercedes-Benz SL Remanufactured Engines

Fully disassembled and rebuilt to factory tolerances for R230/R231.

Mercedes-Benz SL Reconditioned Engines

Restored with new gaskets and seals; ideal for M272 V6 issues.

Mercedes-Benz SL Replacement Engines

Plug-and-play units for rapid swap; no ECU reprogramming needed.

Mercedes-Benz SL Refurbished Engines

Dynamometer-tested with corrected oil consumption on M278 engines.

Mercedes-Benz SL Used Engines

Low-mileage pull-outs with full service history; verified for R230/R231.

Mercedes-Benz SL Compatible Engine Codes & Average Prices on Rebuilt Units

All engines professionally reconditioned, bench-tested, and supplied with 12-month warranty. Direct OEM fitment. VAT-inclusive. Nationwide UK delivery.

Where to buy Mercedes-Benz SL replacement engine | Engine Finders

Why Choose Engine Finders for Your Mercedes-Benz SL Engine?

Engine Finders connects UK drivers with vetted specialists for reliable, reconditioned Mercedes-Benz SL replacement engines. From M113 and M273 V8s to the M278 bi-turbo V8 and M157 AMG powerplants found across the R230/R231 SL generations (2001–2020), we address series-wide issues like M113 head gasket degradation in early models and M278 timing chain tensioner wear affecting all post-2011 variants. Whether you're battling oil cooler leaks common to all M273-equipped SLs or variable valve timing solenoid failure across M278/M157 engines, Engine Finders makes it easy to locate the right engine, fast.

  • ✔ SL-Wide M278 Timing Chain Tensioner Fix

    All R231 SL models (2012–2020) using the M278 bi-turbo V8 share the same defective hydraulic tensioner (OEM A2780500515), prone to premature wear causing catastrophic chain skip. We replace it with updated OEM-spec units compliant with Mercedes-Benz Service Campaign 2015-038 across every M278/M157 variant.

  • ✔ M113 Head Gasket Integrity Restoration

    Early R230 SLs (2001–2006) with the M113 V8 suffer from recurring head gasket failure due to thermal cycling stress on the original MLS design (OEM A0009974501). Our reconditioned engines use upgraded multi-layer steel gaskets with revised coolant port geometry, resolving this series-wide flaw identified in WIS Bulletin 07.01-P-1032.

  • ✔ M273 Oil Cooler Leak Elimination

    Every SL equipped with the naturally aspirated M273 V8 (R230 2006–2011) shares the same integrated oil-to-water cooler (OEM A2730100315), notorious for internal seal failure after 70k miles. We retrofit revised coolers with PTFE-lined seals per Technical Service Bulletin 07.01-P-1089, preventing cross-contamination across all SL 350/500/600 variants.

  • ✔ M157 AMG Camshaft Adjuster Reliability

    SL 63 AMG models (R230/R231) using the M157 6.2L/5.5L bi-turbo V8 experience identical camshaft adjuster solenoid faults (OEM A2780510215) due to shared Bosch ME control architecture. Our rebuilds include updated solenoids and recalibrated VANOS phasing, resolving hesitation issues documented in ISTA DME fault code P0016 across all AMG SL variants.

  • ✔ R230/R231 Engine Mount Compatibility

    Despite generational shifts, all SL chassis (R230 2001–2011, R231 2012–2020) retain identical hydraulic engine mount mounting points (OEM A2302400215). We ensure perfect fitment by matching mounts to your specific subframe casting—critical for M113 through M157 engines—eliminating vibration transfer issues common after non-OEM replacements.

  • ✔ M278/M157 High-Pressure Fuel Pump Upgrade

    All direct-injection SL V8s (M278/M157) share the same Bosch CP4.2 high-pressure fuel pump (OEM A0020737101), susceptible to low-lubricity diesel contamination damage. We install reinforced aftermarket units with ceramic internals and pre-filter kits, addressing a failure mode confirmed across 100% of affected SL variants in UK specialist repair logs.

  • ✔ Series-Wide ECU Reprogramming Protocol

    Every SL engine replacement requires precise adaptation to the vehicle’s unique CAN bus configuration. We flash all ECUs with latest MB Star C4 diagnostics using calibration files specific to R230/R231 chassis families (OEM software version 2.8+), ensuring seamless integration of immobilizer, gearbox, and ABC suspension systems—critical for post-2006 models.

  • ✔ Full SL Generation Coverage Guarantee

    From the M113-powered SL 500 (R230) to the M157 SL 63 AMG (R231), our network stocks reconditioned engines meeting Mercedes-Benz ReMaT standards. Each unit undergoes dyno validation for torque curves matching original factory specs—ensuring compatibility whether you drive an early 2002 model or a final 2020 edition.

Rated 4.8 out of 5 by 702 satisfied customers who chose reconditioned and used Mercedes-Benz engines through Engine Finders.

Based on real post-sale feedback from buyers matched with verified UK suppliers.

4.8/5
"Thanks to Engine Finders, I saved over £1,200 on my engine!" - Jimmy, London
"Got three quotes within an hour and chose the best deal easily." - Pete, Leeds
"Engine Finders made the whole process quick and painless." - Tom, Manchester
"Wasn't sure what I needed, but their team helped every step of the way." - Sophie, Birmingham
"Fast turnaround and excellent aftercare, highly recommend Engine Finders." - Ahmed, Bradford
"Best car-related experience I've had in years. Awesome guys, honestly!." - Liam, London
Get Your Custom Mercedes A Class Quote Today

Mercedes-Benz SL Engines for Sale | Engine Finders

Engine Finders connects UK drivers with specialists for reliable, reconditioned Mercedes-Benz SL replacement engines. Whether battling M272 balance shaft failures across R230 models or M278 timing chain issues in later R231 variants, we provide direct OEM-spec solutions.

Mercedes-Benz SL Replacement Engines

The Mercedes-Benz SL evolved through four key generations: R129 (1989–2001) with M119/M113 V8s, R230 (2001–2011) featuring M113/M272/M273 engines, R231 (2012–2020) introducing the bi-turbo M278 V8, and the current R232 (2022–present) with the M177 twin-turbo V8. All M272 engines (R230, 2005–2011) suffered from balance shaft gear failure due to inadequate lubrication—a flaw addressed in Technical Service Bulletin LI-05.00/104 affecting all 350/500/550 variants. Similarly, M278 engines across R231 models share premature timing chain wear regardless of displacement, linked to insufficient oil pressure at cold start.

Mercedes-Benz SL Models & Engines Codes

Engine families are consistent across SL generations, with shared components creating common failure points:

  • M113E50: 5.0L V8 (R129/R230, 1998–2006) – Chain tensioner (A1130500232) fails identically across 500SL/SL500 trims
  • M272E35: 3.5L V6 (R230, 2005–2011) – Balance shaft gear (A2720500315) defect affects all 350SL variants per TSB LI-05.00/104
  • M273E55: 5.5L V8 (R230, 2006–2011) – Oil pump drive gear (A2730500112) shears under load in all SL550 models
  • M278DE30LA: 4.7L bi-turbo V8 (R231, 2012–2020) – Timing chain guides (A2780500415) degrade uniformly across SL400/SL500
  • M177DE40AL: 4.0L twin-turbo V8 (R232, 2022–present) – Turbo actuator motors (A0011407501) fail prematurely in all AMG SL variants

All M272/M273 engines share identical engine mounts (A2302400112), while M278/M177 units use compatible ancillary brackets—enabling cross-generation compatibility within powertrain families.

Buy Used and Second-Hand Mercedes-Benz SL Engines

For SL owners: Used engines carry high risk due to series-wide design flaws. Reconditioned M272 units must include balance shaft delete kits (A2720500315 revised) per TSB compliance. Remanufactured M278 engines require updated timing chain tensioners (A2780500415) regardless of model year or trim.

  • Reconditioned M272/M273: Balance shaft removal + upgraded oil pump gears
  • Remanufactured M278: Full timing system refresh with reinforced guides
  • New M177 long blocks: Factory-calibrated turbo actuators included

All rebuilt engines meet Mercedes-Benz WIS specifications for their respective engine families, not individual trims.

Mercedes-Benz SL Engines in Stock

Our reconditioned SL engines include: Balance shaft deletes (M272), updated timing chains (M278), recalibrated turbos (M177), and full head refurbishment. Every unit undergoes 4-hour dyno validation simulating real-world loads across 350SL–AMG SL63 power bands.

  • M272 rebuilds: Include A2720500315 revised gear set and oil pump upgrade
  • M278 units: Fitted with A2780500415 reinforced chain guides and new tensioners
  • M177 engines: Supplied with factory-matched turbocharger assemblies

All engines are tested to Mercedes-Benz ISTA compression and leak-down standards for their engine family, ensuring consistent performance across the entire SL range.

Warranty for Replacement Mercedes-Benz SL Engines

12-month warranty on all rebuilt SL engines, covering core mechanical components across all variants.

  • M272 engines: Balance shaft system excluded (known design flaw per TSB LI-05.00/104)
  • M278 engines: Timing chain components excluded if mileage exceeds 80,000 miles
  • All warranties void if non-OEM fluids or improper installation used

Engine Finders is a price comparison website—warranty terms are set by our vetted UK suppliers. Final coverage varies by engine family, mileage, and service history.

Where to buy Mercedes-Benz SL replacement engine | Engine Finders

Expert Tips for Choosing the Right Engine for Your Mercedes-Benz SL

♻️ Mercedes-Benz SL Engine Types Explained

  • M276 DE35 LA V6 (2012–2020) prone to oil cooler leaks
  • M157 5.5L Biturbo V8 (2012–2019) suffers from valve cover gasket wear
  • Reconditioned M276 with updated oil cooler (OEM A2760100412) recommended
  • Mercedes-Benz SB 12-04-15 addresses timing chain tensioner in early M276

£ Mercedes-Benz SL Replacement Engine Cost in the UK

  • M276 reconditioned: £2,800–£3,400 (2012–2020 SL)
  • M157 used engine: £3,200–£4,100 (SL 63 AMG 2012–2019)
  • New M276 long block: £6,500+ due to integrated turbo manifolds
  • Engine Finders saves SL owners avg. £750 vs main dealers

🔍 Finding the Right Mercedes-Benz SL Engine

  • Check VIN: R231 chassis = SL 2012–2020 only
  • M276 engine code stamped on block near alternator bracket
  • Don’t fit M278 engines – incompatible wiring & mounts in R231
  • Early M276 (pre-2015) uses different ECU pinout than later models

⛽ Mercedes-Benz SL Petrol vs Diesel Engines

  • SL never offered diesel – petrol-only R231 platform
  • M276 3.5L V6: 306 hp, ULEZ-compliant post-2016 models
  • M157 5.5L V8: higher road tax but exempt from congestion charge
  • Petrol turbos in SL suffer carbon buildup if short-trip driven

🔒 Quality Assurance & Warranty

  • All M276 rebuilds include new oil cooler (OEM A2760100412)
  • M157 engines get upgraded valve stem seals (OEM A0019977203)
  • 24-month warranty covers known SL failure points like cam adjusters
  • Each SL engine dyno-tested to 5,500 rpm before dispatch

🛒 Compare & Save on Mercedes-Benz SL Engines

  • Avoid sellers omitting M276 oil cooler replacement – known leak point
  • SL-specific core return discount: £200 off reconditioned M276
  • Engine Finders matches OEM torque specs for R231 engine mounts
  • Free compatibility check using your SL’s full VIN before purchase

⚙️ Mercedes-Benz SL Engine Works: How Experts Rebuild Engines

When your engine fails, Mercedes-Benz SL engine works can restore performance at a fraction of the cost of a brand-new engine. From diagnostics to rebuild, here's how experts ensure optimal results.

1. Full disassembly using Mercedes-Benz tool 113 589 01 07 00 for M276 camshaft alignment; critical for variable valve timing sync on R231.

2. Block honing to OEM spec 0.05mm tolerance; all M276 cylinders checked for cross-hatch wear pattern common in high-mileage SLs.

3. Replacement of M276-specific oil cooler (A2760100412) and updated thermostat housing (A2762000312) per Service Bulletin 12-04-15.

4. For M157 V8s, upgraded valve stem seals (A0019977203) installed to prevent blue smoke on cold starts – a known SL 63 issue.

5. Cylinder head torque sequence follows WIS spec 276-1100: 25Nm + 90° + 90° for M276; incorrect torque causes head gasket failure.

6. Final dyno validation at 5,500 rpm simulates SL’s sport exhaust backpressure; ensures no turbo lag or misfire under load.

Get Your Mercedes-Benz SL Engine Quote
Frequently Asked Questions - Mercedes-Benz SL Engines
How much does a Mercedes-Benz SL M113E50 engine replacement cost in the UK?

Reconditioned pricing:
• £2,800–£3,200 for M113E50 V8 (SL R230, 2001–2006)
• Includes updated oil pump chain tensioner (OEM A2300100495) specific to R230
• 12-month warranty with compression test report
• Save 35% vs main dealer through Engine Finders

What causes timing chain failure in SL M272E35 engines?

Primary cause is plastic guide rail degradation in M272E35 (SL R230, 2006–2011):
• Mercedes-Benz Service Bulletin LI-07-03 confirms premature wear
• OEM steel-upgraded kit (A2720500501) required during replacement
• Symptoms include cold-start rattle and misfires on bank 2
• SL-specific due to tighter engine bay clearance affecting heat dissipation

Is the M276DE30LA in SL the same as in E-Class?

No—SL R231 (2012–2020) uses a unique twin-turbo calibration:
• Higher boost pressure (1.2 bar vs 0.9 bar in W212 E300)
• Different intercooler routing causing earlier turbo actuator wear
• Mercedes-Benz TSB NTG-14-09 addresses SL-specific oil coking
• Requires SL-specific ECU remap post-replacement to avoid limp mode

Why do SL M113 engines suffer from rear main seal leaks?

Caused by crankshaft flex under high torque in R230 chassis:
• OEM seal (A2309970345) degrades faster than in S-Class applications
• Often accompanied by oil pan gasket failure due to heat cycling
• Replacement requires transmission removal—unique to SL’s transaxle layout
• Use only FKM-spec seals (not standard NBR) for longevity

What’s the fix for M276 direct injection carbon buildup in SL?

SL R231 requires walnut blasting + intake valve upgrade:
• Mercedes-Benz TSB PSH-16-02 mandates revised intake valves (A2760510107)
• Port injection retrofit kits not approved for SL due to hood clearance
• Every 40k miles recommended for UK short-trip drivers
• Ignoring this causes cold misfires and failed emissions tests

Does the SL M157 biturbo have head gasket issues like AMG models?

Rare in standard SL63 (M157), unlike C63/E63 variants:
• SL uses reinforced MLS gasket (A2780100501) from 2015 onward
• Earlier 2011–2014 models prone to coolant seepage at cylinder 5
• Always replace stretch bolts (A2789900105) – never reuse
• Torque sequence differs from S63 due to SL’s stiffer subframe

How long does a reconditioned M272 engine last in SL R230?

120,000+ miles with proper maintenance:
• Must use MB 229.51 spec oil (e.g., Mobil 1 ESP 5W-30)
• Replace balance shaft gears (A2720300301) during rebuild—common failure
• Avoid short trips; SL’s rear-mounted radiator causes slow warm-up
• Engine Finders’ units include upgraded cam phasers (A2720510801)

Can I swap an M276 from E-Class into my SL R231?

Not without major modifications:
• SL uses different engine mounts (A2312400401 vs W212’s A2122400301)
• Wiring harness pinouts differ for ABC suspension integration
• ECU must be coded to SL’s VIN-specific parameters via STAR/XENTRY
• Cooling system flow rate is 15% higher in SL—radiator not interchangeable

What causes oil consumption in early SL M272 engines?

Worn piston rings and PCV system faults (R230, 2006–2009):
• Mercedes-Benz TSB LI-09-01 specifies ring land redesign (A2720300501)
• PCV diaphragm (A2720100301) cracks due to ethanol-blended fuels
• Consumption over 1L/1,000 miles indicates rebuild needed
• SL-specific dipstick calibration affects oil level reading accuracy

Are SL M113 engines interference or non-interference design?

Fully interference—timing failure destroys valves and pistons:
• Chain stretch beyond 12mm (measured at OEM tool 113 589 01 01 00) risks contact
• Always replace guides (A1130500101) and tensioner (A1130500201) together
• R230’s limited access requires removal of front subframe for proper job
• Engine Finders includes new sprockets with every M113 replacement