Mercedes Benz SL SL600 V12 Engine ReplacementCompare Prices & Get Quotes

Short Summary: Mercedes Benz SL600 V12 engine replacement costs range from £1,800 for used M275 units to £6,500 for fully rebuilt engines with 12-month warranty. Typical reconditioned M275 V12 prices sit between £3,200-£5,500 supply-only. Prices vary by engine code (M275 E55 vs M275 KE55), year, and whether supply & fit is included.

• Used Mercedes Benz SL600 V12 engines start around £1,800 for M275 E55 units
• Reconditioned M275 V12 engines typically cost £3,200-£5,500 supply-only
• Rebuilt M275 KE55 engines with upgraded components can exceed £6,000
• Supply & fit adds £900-£1,300 depending on garage location and ABC complexity

Short Summary: The most common symptom of M275 V12 coil pack failure in the Mercedes Benz SL600 V12 is a persistent misfire, often affecting cylinders 2-7 on the inner bank. Check engine light, rough idle, loss of power, and unburnt fuel smell from the exhaust are all warning signs. If ignored, misfires can destroy catalytic converters.

• Misfire codes (P0300-P0312) stored in ECU - cylinders 7-12 most commonly affected
• Rough idle and hesitation under acceleration, particularly from cold start
• Fuel smell from exhaust due to unburnt fuel entering catalytic converters
• Leaking valve cover gasket allows oil into spark plug wells, destroying coil PCBs

Short Summary: Replacing a Mercedes Benz SL600 V12 M275 V12 engine costs £3,200-£6,500 rebuilt, often representing better value than selling a depreciated V12 SL with engine faults. For low-mileage examples or collector-grade R230 SL600 V12s with full history, engine replacement preserves significant investment value.

• Rebuilt M275 V12 engines cost £3,200-£6,500 supply-only from UK specialists
• SL600 V12 values with faulty engines drop 60-70% versus running examples
• Coil pack replacement (£1,200-£1,600) may resolve misfires without full engine rebuild
• Low-mileage R230 SL600 V12 examples justify rebuild investment given appreciating classic status

Short Summary: Your Mercedes Benz SL600 V12 engine code appears on the engine block stamping, vehicle registration document, or via DVLA lookup using your registration number. Pre-facelift (2003-2006) SL600 V12s carry the M275 E55 (275.951), while facelift (2006-2011) models use the M275 KE55 (275.954).

• Engine code stamps appear on the block near the cylinder head or oil filter housing
• V5C registration document lists engine capacity and fuel type but not full code
• DVLA online vehicle enquiry using your reg confirms basic engine specifications
• Pre-facelift: M275 E55 (493hp) - facelift: M275 KE55 (517hp)

Short Summary: The Mercedes Benz SL600 V12 M275 engine uses a duplex roller timing chain, not a belt. However, timing chain tensioner wear has been documented on higher-mileage examples, causing cold-start rattle. If ignored, chain stretch can lead to catastrophic engine damage.

• Every Mercedes Benz SL600 V12 M275 engine uses a timing chain system
• Timing chain tensioner wear causes rattle on cold start, typically above 100k miles
• Chain stretch can trigger camshaft angle errors and misfire codes
• Preventative tensioner replacement recommended at 100k miles

Short Summary: Reconditioned Mercedes Benz SL600 V12 engines supplied through EnginesMarket include a minimum 12-month unlimited mileage warranty covering parts and labour at any UK garage. Specialist rebuilders may offer extended 24-month coverage on upgraded M275 V12 units with new coil packs and wiring harnesses.

• Minimum 12-month unlimited mileage warranty included on all EnginesMarket supplied engines
• Labour coverage valid at any UK garage, not just the supplying specialist
• Upgraded components like coil packs and wiring harnesses often carry extended coverage
• Warranty terms vary by supplier - always confirm exact coverage before purchase