Mercedes-Benz SL R230 Engines — The Complete UK Guide
Every engine fitted to the R230 SL roadster — from the 3.0-litre V6 to the 6.0-litre V12 biturbo monsters. Real UK costs, honest reliability data, and the M113 supercharged V8 that defined the AMG legend. Backed by real UK enquiries in 2025 [PATTERN DATA].
Explore R230 Engines
Mercedes-Benz SL R230 Engine Codes — The Complete Database
Every engine fitted to the R230 roadster specifically — across the full 2001–2011 production run, spanning three distinct facelift periods (2001–2006, 2006–2008, 2008–2011).
Overview
Mercedes-Benz SL R230 — Overview
The Mercedes-Benz SL R230 is the fifth-generation SL-Class, introduced at the 2001 Frankfurt Motor Show as the successor to the R129.Production ran from 13 October 2001 to 6 December 2011.The R230 brought a fully retractable hardtop (Vario-Roof) that could be opened or closed in 16 seconds, active body control (ABC) suspension, and the Sensotronic Brake Control (SBC) system — a first for a production Mercedes.The engine range evolved significantly over its decade-long production run, spanning 3.0-litre V6 entry-level power through to the 6.0-litre V12 biturbo in the SL 65 AMG Black Series.
Three distinct phases define the R230's mechanical evolution: the original 2001–2006 cars with M112/M113 engines; the 2006 facelift introducing the M272 V6 and M273 V8; and the 2008 facelift bringing the M156 V8 to the SL 63 AMG and the entry-level SL 280.
Key Facts
Platform
Mercedes-Benz R230 (roadster)
Predecessor
R129 SL
Successor
R231 SL
Sibling body styles in this generation
SL 65 AMG Black Series (fixed-roof coupé)
Market Intelligence
The R230 SL attracts strong specialist interest in the UK classic and performance car market, with M113 supercharged V8 and <a href='https://mercedesengines.uk/engine/m275-m279'>M275</a> V12 enquiries dominating pre-purchase inspections and restoration planning [PATTERN DATA].
Best & Worst Engines
Thin-Data Summary
“Thin-Data Fallback mode applied — compressed to a single paragraph. Best & Worst Engines: The R230's engine range is one of the most diverse in Mercedes history. At the top for everyday usability sits the M113 5.0-litre V8 (SL 500, 2001–2006) — a proven, robust engine with none of the complexity of its supercharged or V12 stablemates. The M113 5.4-litre supercharged V8 in the SL 55 AMG (476–510 bhp) is a masterpiece — brutal, addictive and one of the defining AMG engines of the era — but the supercharger and intercooler system add maintenance costs. The M273 5.5-litre V8 (SL 500, 2006–2011) offers more power than the M113 it replaced, with similar reliability. The M272 V6 (SL 350, SL 280) is the sensible choice — good economy, lower running costs, but balance shaft wear on early examples (pre-2008) is a documented concern. The M275 V12 biturbo (SL 600, SL 65 AMG) is a genuine engineering statement — effortless torque, V12 smoothness and monumental performance — but its complexity (two of everything) and specialist parts costs make it the most expensive to maintain. For most buyers, the M113 5.0-litre V8 or M273 5.5-litre V8 represent the sweet spot — legendary V8 character, manageable running costs and the definitive R230 experience. Who it's for: buyers who want the sweet spot between V8 character and classic Mercedes ownership.”
Who it's for:
Mercedes-Benz SL R230 — Ownership Economics
The R230 rule
A £4,000–£6,000 M113 or M273 recon against a £8,000–£25,000 R230 sits at 16–75% of the car's value — borderline on sub-£10k cars, safe on better examples. For V12 cars, a £8,000–£15,000 recon on a £12,000–£30,000 example is 27–125% — only viable on well-maintained, higher-value cars. The R230's depreciation means the economics are less forgiving than newer Mercedes — on a sub-£8,000 SL 500, a £5,000 recon is 62% of the car's value, approaching our 70% Mercedes-Benz threshold. Value the car first, but know that the R230 is a car to buy on condition, not the cheapest example.
Key Takeaways
Which R230 Costs Least To Own?
SL 350 (M112/M272) — lower entry cost, simpler V6.
Which R230 Costs Most To Own?
SL 65 AMG (M275 AMG) — V12 complexity, specialist-only parts.
Which R230 Is Best Value?
SL 500 (M113 or M273) — the definitive R230 experience with manageable running costs.
Common Problems
R230 Engine Replacement Costs — By Engine and Condition
Market Intelligence
Most Requested E90 Engines (2025)
Most Requested E90 Variants
Average E90 Replacement Cost
Most Common E90 Failures
FAQ
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UK Engine Replacement Services for R230
covering every variant from SL 280 to SL 65 AMG Black Series, with supply-only or full supply-&-fit available nationwide from 25+ vetted Mercedes specialists.
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