How much does a Mercedes E Class 220 CDI engine replacement cost in the UK-

Supply-only rebuilt OM611 or OM646 engines range from £1,900 to £3,200 depending on engine code and condition. With specialist fitting, budget £2,300-£4,000 total. OM611.961 (E 220 CDI, 143 hp): rebuilt £1,900-£3,000. OM646.961 (E 220 CDI, 150 hp): rebuilt £2,000-£3,200. Labour adds £400-£800 depending on specialist location.

What are the signs of 'Black Death' injector failure in an E Class 220 CDI-

Visible black, crusty carbon deposits around the injector bases under the engine cover - along with a diesel smell in the cabin or engine bay. Hard, tar-like carbon buildup around one or more injectors is the classic sign. May be accompanied by a chuffing sound from the leaking injector seal. If ignored, injectors can seize in the head, requiring specialist extraction. Early replacement of seals (£350-£550 at a specialist) prevents costly head damage.

Is it worth replacing the engine on an older E Class 220 CDI-

Yes, if the car is otherwise sound and the replacement cost is under £3,500 supply and fit. W211 E Classes still command £2,500-£6,000 used, making replacement viable. A quality rebuilt OM646 costs £2,000-£3,200 supply only. W211 examples with good service history still hold strong value. A replacement engine with warranty costs less than financing a newer car. Specialist fitting adds £400-£800, not dealer rates of £1,500+.

What causes the timing chain to fail on E Class 220 CDI models-

The single-row timing chain stretches when oil changes exceed 10,000 miles - extended service intervals are the primary culprit. Cold-start rattle is the first warning sign. Chain stretch typically occurs between 100,000-200,000 miles. Cold-start rattle that disappears after a few seconds is the early warning. Tensioner replacement at a specialist costs £350-£600; full chain replacement £750-£1,200. Some OM646 examples have exceeded 250,000 miles on the original chain.

What is the difference between the OM611 and OM646 engines in the E Class 220 CDI-

The OM646 is an evolution of the OM611 - both are 2.1-litre inline-four turbodiesels, but the OM646 features improved fuel injection pressure (1,600 bar vs 1,350 bar) and Euro 4 emissions compliance. OM611 fitted to W210 E-Class (1999-2002) - Euro 3, 143 hp. OM646 fitted to W211 E-Class (2002-2009) - Euro 4, 150 hp. OM646 features a Lanchester balancer shaft for improved smoothness. Both share the same 88mm bore × 88.3mm stroke.

How long does a Mercedes E Class 220 CDI engine last-

With proper maintenance and 8,000-10,000 mile oil changes, OM611 and OM646 engines regularly reach 250,000-300,000 miles. Some examples have exceeded 500,000 miles in taxi and fleet use. OM611/OM646 bottom ends are exceptionally robust. Injector seal replacement at 80k-150k miles is the key maintenance item. Timing chain tensioner replacement at 100k+ miles prevents issues. Short oil change intervals (8k miles) are critical for longevity.

Mercedes E Class 220 CDI SPECIALISTS

Mercedes Benz E Class 220 CDI Engine Replacement Compare Prices & Get Quotes

Get quotes today from trusted UK Mercedes Benz E Class 220 CDI engine specialists. Compare prices on reconditioned, rebuilt and used OM611 and OM646 diesel engines - supply & fit available nationwide.

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Mercedes Benz E Class 220 CDI Engine

from£1,200 to £3,200

Usedfrom £800
Reconditionedfrom £1,500
Common codesOM611.961, OM646.961

Mercedes Benz e-class 220 CDI Used Engine — OM611.961

Mercedes Benz e-classUsed Engine — OM611.961

Mercedes Benz e-class 220 CDI Reconditioned Engine — OM611.961

Mercedes Benz e-classReconditioned Engine — OM611.961

Mercedes Benz e-class 220 CDI Rebuilt Engine — OM611.961

Mercedes Benz e-classRebuilt Engine — OM611.961

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How it works

3 Simple Steps to Finding the Right Replacement Engine

Clear information first, then the right engine and specialist for your exact vehicle.

Variant History

Mercedes Benz E Class 220 CDI Engine History & Specs at a Glance

The E 220 CDI badge represented Mercedes-Benz's mid-range diesel offering across the W210 and W211 E-Class generations. It used 2.1-litre inline-four turbodiesel engines - the OM611 in the W210 and the updated OM646 in the W211 - delivering the blend of performance and economy that made these cars UK taxi and fleet favourites.

1999
W210 E 220 CDI launched with OM611.961 2.1-litre turbodiesel, 105 kW (143 hp)
**1999-2000** - OM611 displacement reduced from 2,151cc to 2,148cc for E-Class applications
2002
W211 E 220 CDI launched with updated OM646.961 engine, 110 kW (150 hp), Euro 4 compliant
**2002-2006** - OM646 DE 22 LA fitted to W211 E 220 CDI (110 kW / 150 hp) with Lanchester balancer shaft for six-cylinder smoothness
2006
OM646 updated; E 220 CDI available with 125 kW (170 hp) variant in some markets
2009
W211 production ends; OM651 replaced OM646 in W212 generation

Every engine fitted to the Mercedes E Class 220 CDI is covered below, with UK rebuilt pricing and known failure points.

Engine Codes & Pricing

Mercedes Benz E Class 220 CDI Engine Codes Specifications & Replacement Cost

Find your exact engine code, specs and UK replacement cost guide.

OM611.961 — 2.1L Diesel (1999-2002)

Power Output: 105 kW (143 hp)
Years Fitted: 1999-2002 (W210 E-Class)

Can’t find your exact engine code?-> Get quotes for OM611 Mercedes E Class 220 CDI engine replacement

-> Get quotes for OM611 Mercedes E Class 220 CDI engine replacement

Common Problems

Mercedes E Class 220 CDI Engine Problems Repair Cost vs Replacement

The OM611 and OM646 engines that power the E Class 220 CDI are fundamentally robust units - properly maintained examples regularly exceed 250,000 miles, with some Sprinters using the same family reaching nearly 500,000 miles without major failures. However, two specific failures dominate replacement enquiries: injector seal failure ("Black Death") and timing chain wear. Every rebuilt engine supplied through EnginesMarket includes upgraded components designed to address the original failure point, plus a minimum 12-month unlimited mileage warranty. Below, we break down what these failures cost to fix and when replacement is the smarter option.

Common failure points and repair options

"Black Death" Injector Seal Failure

Affected: Mercedes E Class 220 CDI (OM611, OM646, 1999-2009)
Typical failure mileage: 80,000 - 150,000 miles

Root cause

The copper injector sealing washer degrades over time, allowing combustion gases to escape past the injector. This creates hard carbon deposits - the characteristic "Black Death" - that can weld injectors into the cylinder head. Injector seals cost as little as £1 each, but labour and specialist tools make the repair significantly more expensive.

Repair options

Repair tier	Dealer price	Specialist price
Minor - Injector Seal Replacement	£600-£900	£350-£550
Major - Injector Extraction & Head Repair	£1,200-£2,000	£800-£1,400
Full Replacement - Rebuilt Engine	£3,500-£5,000	£1,900-£3,200

Our recommendation

Injector seal replacement is almost always the right first step if caught early - the £350-£550 specialist cost is far less than the £2,000+ bill for a seized injector removal and head repair. If "Black Death" has been ignored and the injectors are seized, weigh the cost of head repair against a rebuilt engine. On a W211 E 220 CDI with good bodywork and transmission, a rebuilt engine often makes more sense than a costly extraction job.

-> Compare rebuilt OM611 / OM646 Mercedes E Class 220 CDI engine prices

Timing Chain Stretch

Affected: Mercedes E Class 220 CDI (OM611, OM646, 1999-2009)
Typical failure mileage: 100,000 - 200,000+ miles

Root cause

The OM611 and OM646 use a single-row timing chain design. The chain stretches over time when oil change intervals exceed 10,000 miles. The chain tensioner loses hydraulic pressure overnight, causing a rattling noise on cold start for a few seconds until oil pressure builds. While the OM611/OM646 chains are considered robust with documented examples exceeding 250,000 miles on the original chain, tensioner wear remains a reported issue.

Repair options

Repair tier	Dealer price	Specialist price
Preventative - Timing Chain Tensioner Replacement	£600-£1,000	£350-£600
Major - Timing Chain & Tensioner Replacement	£1,200-£1,800	£750-£1,200
Full Replacement - Rebuilt Engine	£3,500-£5,000	£1,900-£3,200

Our recommendation

The cold-start rattle is your early warning - don't ignore it. A specialist tensioner replacement at £350-£600 is significantly cheaper than the £1,200+ full chain replacement if the chain stretches further. If the chain has jumped and bent valves, a rebuilt engine with warranty typically offers better value than a dealer-led rebuild, particularly on a W211 with strong residual value.

-> Get OM611 / OM646 Mercedes E Class 220 CDI timing chain quotes

Don't Let Engine Failure Write Off Your Mercedes E Class 220 CDI

Whether your E Class 220 CDI is suffering from injector "Black Death" or you've noticed the telltale cold-start rattle of a timing chain tensioner issue, EnginesMarket makes it simple to compare prices from trusted UK Mercedes specialists. Every rebuilt engine in our network includes upgraded components designed to address the original failure point - plus a minimum 12-month unlimited mileage warranty and nationwide delivery. Compare prices, choose a specialist, and get back on the road without the main dealer premium.

Compare Mercedes E Class 220 CDI Engine Replacement Prices Now ->

FAQ

Mercedes E Class 220 CDI Engine ReplacementFrequently Asked Questions

Everything Mercedes Benz E Class 220 CDI owners usually ask before choosing a rebuilt, reconditioned or used replacement engine.

Short summary: Supply-only rebuilt OM611 or OM646 engines range from £1,900 to £3,200 depending on engine code and condition. With specialist fitting, budget £2,300-£4,000 total.

OM611.961 (E 220 CDI, 143 hp): rebuilt £1,900-£3,000
OM646.961 (E 220 CDI, 150 hp): rebuilt £2,000-£3,200
Labour adds £400-£800 depending on specialist location

-> Compare Mercedes E Class 220 CDI engine replacement costs by entering your reg now

Short summary: Visible black, crusty carbon deposits around the injector bases under the engine cover - along with a diesel smell in the cabin or engine bay.

Hard, tar-like carbon buildup around one or more injectors is the classic sign
May be accompanied by a chuffing sound from the leaking injector seal
If ignored, injectors can seize in the head, requiring specialist extraction
Early replacement of seals (£350-£550 at a specialist) prevents costly head damage

-> Get quotes for OM611 / OM646 injector seal replacement before it's too much

Short summary: Yes, if the car is otherwise sound and the replacement cost is under £3,500 supply and fit. W211 E Classes still command £2,500-£6,000 used, making replacement viable.

A quality rebuilt OM646 costs £2,000-£3,200 supply only
W211 examples with good service history still hold strong value
A replacement engine with warranty costs less than financing a newer car
Specialist fitting adds £400-£800, not dealer rates of £1,500+

-> Compare rebuilt Mercedes E Class 220 CDI engine prices for your mileage and budget

Short summary: The single-row timing chain stretches when oil changes exceed 10,000 miles - extended service intervals are the primary culprit. Cold-start rattle is the first warning sign.

Chain stretch typically occurs between 100,000-200,000 miles
Cold-start rattle that disappears after a few seconds is the early warning
Tensioner replacement at a specialist costs £350-£600; full chain replacement £750-£1,200
Some OM646 examples have exceeded 250,000 miles on the original chain

-> Get quotes for OM611 / OM646 timing chain replacement before it's too late

Short summary: The OM646 is an evolution of the OM611 - both are 2.1-litre inline-four turbodiesels, but the OM646 features improved fuel injection pressure (1,600 bar vs 1,350 bar) and Euro 4 emissions compliance.

OM611 fitted to W210 E-Class (1999-2002) - Euro 3, 143 hp
OM646 fitted to W211 E-Class (2002-2009) - Euro 4, 150 hp
OM646 features a Lanchester balancer shaft for improved smoothness
Both share the same 88mm bore × 88.3mm stroke

-> Find the correct Mercedes E Class 220 CDI engine for your exact chassis and engine code

Short summary: With proper maintenance and 8,000-10,000 mile oil changes, OM611 and OM646 engines regularly reach 250,000-300,000 miles. Some examples have exceeded 500,000 miles in taxi and fleet use.

OM611/OM646 bottom ends are exceptionally robust
Injector seal replacement at 80k-150k miles is the key maintenance item
Timing chain tensioner replacement at 100k+ miles prevents issues
Short oil change intervals (8k miles) are critical for longevity

-> Compare Mercedes E Class 220 CDI engine replacement quotes - be ready when the time comes

Why Choose Us

Compare Mercedes E Class 220 CDI Engine Prices Today

Comparing quotes for your Mercedes E Class 220 CDI engine replacement is free, no-obligation, and specific to your exact engine code and model year. Enter your registration above to get tailored prices from vetted UK specialists - whether you need a used OM611, a reconditioned OM646, or a fully rebuilt unit with warranty and fitting. Don't pay main dealer premiums - compare, choose, and get back on the road with confidence.

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