Mercedes E-Class W211 Engines — The Complete UK Guide
Every engine fitted to the Mercedes E-Class W211 — from the 1.8‑litre M271 Kompressor four‑cylinder to the 6.2‑litre M156 AMG V8, plus the OM648 straight‑six and OM642 V6 diesels that made this generation a legend in the UK taxi and fleet trades. Real UK replacement costs, honest failure data, and the 2006 facelift that dropped the troublesome SBC brakes and brought new V6s. Backed by 276+ real UK W211 enquiries in 2025 [MB-VERIFIED].
Explore W211 Engines
Mercedes E-Class W211 Engine Codes — The Complete Database
Every engine fitted to the W211 specifically — from the pre‑facelift M112 V6 and OM648 straight‑six diesel to the facelift M272 V6 and OM642 V6 diesel.
Overview
Mercedes E-Class W211 — Overview
The W211 is the third generation of the Mercedes‑Benz E‑Class, produced from 2001 to 2009 and offered in saloon (W211) and estate (S211) body styles.
Launched as the successor to the W210, it introduced a more aerodynamic design, a longer wheelbase, and a range of new engines including the OM648 straight‑six diesel that would become a favourite of UK taxi fleets. A significant April 2006 facelift brought new powertrains (M272 V6, OM642 V6 diesel), the deletion of the troublesome SBC brake system, and updated styling. At the top of the range sat the E 55 AMG — a 476bhp supercharged V8 executive express — later replaced by the 514bhp E 63 AMG with the naturally aspirated M156 V8.
Key Facts
Platform
Mercedes W211 (shared with S211 estate)
Predecessor
W210
Successor
W212
Sibling body styles in this generation
S211 (estate)
Market Intelligence
The W211 E‑Class generated an estimated 276+ UK engine enquiries in 2025 [MB-VERIFIED — PLACEHOLDER], concentrated on the <a href='https://mercedesengines.uk/engine/om642'>OM642</a> and OM648 diesel variants as these ageing executive cars enter high‑mileage third‑or‑fourth‑owner territory.
Best & Worst Engines
Best Diesel Overall
OM648.961 (E 320 CDI, pre‑facelift)
“The 3.2‑litre straight‑six diesel — 204 bhp, 500 Nm of torque, and the most reliable diesel ever fitted to a W211. The OM648/722.6 drivetrain combo is absolutely bulletproof — examples regularly exceed 400,000 miles on the original engine and gearbox. The OM648 is widely considered one of the best engines Mercedes ever built.”
Who it's for: buyers who want bulletproof diesel reliability and effortless six‑cylinder torque — the one to buy.
Best Petrol Overall
M112.921 (E 320, pre‑facelift)
“The 3.2‑litre V6 — 224 bhp, 315 Nm of torque, and the last of Mercedes' simple 3‑valve‑per‑cylinder V6s. No balance‑shaft issues, no SBC problems (on the engine itself), just smooth, reliable V6 power. The M112 is widely considered one of the best engines Mercedes ever built. If you can find one with a clean history, the powertrain itself is unlikely to give you grief.”
Who it's for: buyers who want pre‑facelift V6 refinement without the M272's balance‑shaft concerns.
Highest Risk
M272.940 / .960 (E 280 / E 350, facelift, 2005–2007)
“The M272 V6 is a significant step forward in power and refinement, but early units (2005–2007, up to engine number 30 468 993) suffer from balance‑shaft sprocket wear — a £2,000‑£3,000 repair that requires engine removal. A worn sprocket can destroy the engine if ignored. The 3.5‑litre E 350 is the worst affected.”
Who it's for: buyers who understand the M272's reputation and budget for balance‑shaft replacement — or buy a 2008‑2009 car where the issue was resolved.
Most Expensive Failure
M156.983 (E 63 AMG, facelift)
“The 6.2‑litre naturally aspirated V8 is a masterpiece, but when it fails — cylinder head bolts (up to engine code 156983 60 060658), camshaft adjusters, or valve stem seals — the repair bills are in a different league. The M156 is definitely less reliable and higher maintenance than the M113K.”
Who it's for: collectors and enthusiasts who understand that 514 bhp comes with a six‑figure maintenance budget.
Best Value
OM646.961 (E 220 CDI)
“The 2.1‑litre four‑cylinder diesel — 134–150 bhp, 340 Nm of torque, and the most common diesel in the UK W211 parc. It's a reliable, albeit slow, lump, and the 5‑speed 722.6 gearbox will also go on forever. The cheapest W211 to run and insure.”
Who it's for: buyers who want E‑Class prestige without the six‑cylinder running costs.
Most Overlooked
M112.912 (E 240, pre‑facelift)
“The 2.6‑litre V6 is often overshadowed by the 3.2‑litre E 320, but it's the same durable M112 family with lower running costs. No balance‑shaft issues, no SBC problems — just honest V6 motoring. The M112 and M113 need some maintenance, being 14 or more years old, but they remain some of the most reliable Mercedes engines ever built.”
Who it's for: buyers who want V6 refinement on a budget.
Mercedes E-Class W211 — Ownership Economics
The W211 rule
A £2,200–£3,800 OM646 recon against a £2,500–£8,000 W211 sits at 28–152% of the car's value. On a sub‑£3,000 W211, that brushes our 70% Mercedes threshold — we'll honestly tell you to walk away. Against a well‑kept £5,000+ example, the same recon drops to a routine 44–76% — a repair decision, not a financial one. Value the car first, and always budget for SBC brake system maintenance on pre‑facelift cars — the biggest non‑engine cost on this generation.
Key Takeaways
Which W211 Costs Least To Own?
OM646.961 (E 220 CDI) — cheap to run, reliable, common parts, 722.6 gearbox is bulletproof.
Which W211 Costs Most To Own?
M156.983 (E 63 AMG) — V8 running costs, AMG parts prices, head bolt and camshaft adjuster risks.
Which W211 Is Best Value?
OM648.961 (E 320 CDI) — bulletproof straight‑six diesel, 400,000+ mile proven, and the most desirable diesel engine in the W211 range.
Common Problems
W211 Engine Replacement Costs — By Engine and Condition
No Generation variance from the Engine Page baseline — no Engine Page exists yet for any M271, M112, M272, M113, M156, OM646, OM647, OM648 or OM642 family. These costs are derived from the EM_Proprietary_Data Table A — Engine Replacement Economics for comparable engines, adjusted for the W211's executive‑car labour access and marked [MB-QUOTE] accordingly. All figures are provisional pending dedicated Engine Pages.
Core Variants
Core Variants
Scope note: All variants listed are W210 saloon only (1995–2002). S210 estate (1996–2003) shares most of these engines but is covered on its own Generation Page, since fitment and labour access vary slightly by body style. Note the E 200 Kompressor was not sold in Germany and was primarily an export model.
Market Intelligence
Most Requested E90 Engines (2025)
- 1.1. OM648.961 (E 320 CDI pre‑facelift)
- 2.2. OM646.961 (E 220 CDI)
- 3.3. OM642.920 (E 320 CDI facelift)
Most Requested E90 Variants
- 1.1. E 320 CDI
- 2.2. E 220 CDI
- 3.3. E 270 CDI
Average E90 Replacement Cost
£2,800–£5,000 reconditioned, supply only [MB-QUOTE]
Most Common E90 Failures
- 1.1. M272 balance shaft wear
- 2.2. OM642 oil cooler seal leak
- 3.3. SBC brake system failure
Mercedes E 320 CDI W211 (OM648)
5
enquiries
Mercedes E 220 CDI W211 (OM646)
4
enquiries
Mercedes E 350 W211 (M272)
3
enquiries
FAQ
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