Mercedes Benz SLK 200/230 Kompressor Engine ReplacementCompare Prices & Get Quotes
Get quotes today from trusted UK Mercedes Benz SLK 200 Kompressor and SLK 230 Kompressor engine specialists. Compare prices on reconditioned, rebuilt and used engines for the supercharged M111 and M271 four-cylinders - supply & fit available nationwide.
Supply & Fit Available
12-Month Warranty
Nationwide Delivery
100+ Suppliers
From £1,700 to £3,600
Used from £800 · Reconditioned from £1,700 · Common codes: M111.943, M111.973, M271.944, M271.954
From £800
Tested, bare/short engine
From £1,700
Rod bearings addressed, tested
From quote
Upgraded bearings, full teardown, revised valvetrain
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3 Simple Steps3 Simple Stepsto Finding the Best Mercedes Benz SLK 200/230 Kompressor Replacement Engineto Finding the Best Mercedes Benz SLK 200/230 Kompressor Replacement Engine
Most replacements completed within 3-5 days.
Variant HistoryMercedes Benz SLK 200/230 Kompressor - Engine History & Specs at a Glance
The SLK 200 Kompressor and SLK 230 Kompressor launched with the R170 generation in 1996, powered by the M111 2.0-litre and 2.3-litre supercharged four-cylinder engines - robust, characterful units that defined the SLK's sporty personality. In 2004, the R171 generation introduced the M271 1.8-litre supercharged engine for the SLK 200 Kompressor, offering improved power and efficiency while retaining the supercharged character that SLK owners loved. The 230 Kompressor badge was retired with the R170, making the R170 SLK 230 Kompressor a beloved classic among Mercedes enthusiasts.
Variant HistoryMercedes Benz SLK 200/230 Kompressor - Engine History & Specs at a Glance
The SLK 200 Kompressor and SLK 230 Kompressor launched with the R170 generation in 1996, powered by the M111 2.0-litre and 2.3-litre supercharged four-cylinder engines - robust, characterful units that defined the SLK's sporty personality. In 2004, the R171 generation introduced the M271 1.8-litre supercharged engine for the SLK 200 Kompressor, offering improved power and efficiency while retaining the supercharged character that SLK owners loved. The 230 Kompressor badge was retired with the R170, making the R170 SLK 230 Kompressor a beloved classic among Mercedes enthusiasts.
Mercedes Benz SLK 200/230 Kompressor
Fuel TypePetrol (supercharged four-cylinder)
Engine Size Range1.8L-2.3L (M111.943: 1,998cc; M111.973: 2,295cc; M271.944: 1,796cc)
Power Output Range163-197hp across the variant's historyEngine History Timeline
M111.943 2.0L supercharged four-cylinder, 192hp @ 5,300rpm (SLK 200 Kompressor, R170 launch)
M111.973 2.3L supercharged four-cylinder, 193hp @ 5,300rpm (SLK 230 Kompressor, R170 launch)
2004 - M111.983 2.3L supercharged four-cylinder, 197hp (SLK 230 Kompressor facelift, R170)
M271.944 1.8L supercharged four-cylinder, 163hp @ 5,500rpm (SLK 200 Kompressor, R171 launch)
M271.954 1.8L supercharged four-cylinder, 184hp (SLK 200 Kompressor, R171 facelift)
Key Specs Snapshot
Fuel TypePetrol (supercharged four-cylinder)Engine Size Range1.8L-2.3L (M111.943: 1,998cc; M111.973: 2,295cc; M271.944: 1,796cc)Power Output Range163-197hp across the variant's historyYears Produced1996-2010Every engine fitted to the Mercedes Benz SLK 200 Kompressor and SLK 230 Kompressor is covered below, with UK rebuilt pricing and known failure points - from M111 head gasket and supercharger clutch wear to M271 timing chain stretch and camshaft adjuster failure.
Mercedes Benz SLK 200/230 Kompressor Engine Codes - Specifications & Replacement CostMercedes Benz SLK 200/230 Kompressor Engine Codes - Specifications & Replacement Cost
2.0L Supercharged Four-Cylinder (1996-2000)
Power Output192 hp (141 kW) @ 5,300 rpmTorque270 Nm @ 2,500-4,800 rpmYears Fitted1996-2000Displacement1,998 ccCylindersInline 4, 15° inclination to the right, DOHC, 16-valveEngine CodeM 111 E 20 ML / 111.943
Compatible Trim Levels
- SLK 200 Kompressor
- SLK 200 Kompressor Sport (R170)
Find your exact engine code, specs and UK replacement cost guide.
Used
Tested, ready-to-fit engine
£800-£1,500
Reconditioned
Addressed known issues, tested
£1,700-£2,600
Rebuilt
Full teardown, upgraded internals
£2,000-£3,000
Common Failure
Head gasket degradation - the M111's original Victor Reinz fibre head gasket can fail with age, causing coolant loss and overheating. Supercharger clutch bearing wear causing noise and engagement issues. Timing chain stretch can occur at higher mileages (160,000-200,000 km).
The SLK 200 and 230 Kompressor's supercharged M111 and M271 engines are characterful and rewarding, but both have well-documented weaknesses that become more pronounced with age and mileage. The M111 is prone to head gasket failure and supercharger clutch wear, while the M271 is notorious for timing chain stretch and camshaft adjuster issues. Every rebuilt engine supplied through EnginesMarket includes upgraded components addressing these original failure points, plus a minimum 12-month unlimited-mileage warranty.
The Classic Kompressor's Most Common Weakness
Affected Vehicles
Mercedes SLK 200 Kompressor, SLK 230 Kompressor (M111.943, M111.973, M111.983, 1996-2004)
Typical Failure Mileage
80,000-120,000 miles
Root Cause
The M111's original Victor Reinz fibre head gasket can degrade with age and heat cycling, causing coolant loss and overheating. If ignored, it can lead to engine seizure and catastrophic failure. The head gasket issue is considered the most significant weakness of the otherwise excellent M111 engine.
Why It Happens
The M111's original Victor Reinz fibre head gasket can degrade with age and heat cycling, causing coolant loss and overheating. If ignored, it can lead to engine seizure and catastrophic failure. The head gasket issue is considered the most significant weakness of the otherwise excellent M111 engine.
Dealer (parts + labour)
£150-£300
Specialist (parts + labour)
£100-£200
What it involves
Pressure test, coolant system inspection, leak detection
Suitability
First step - confirms whether head gasket is the cause
1 - 2 daysDealer (parts + labour)
£1,500-£2,500
Specialist (parts + labour)
£900-£1,600
What it involves
Cylinder head removal, skim if warped, new MLS gasket, timing reassembly
Suitability
If caught before cylinder head damage occurs
1 - 2 daysDealer (parts + labour)
£4,000-£5,500
Specialist (parts + labour)
£2,200-£3,400
What it involves
Complete engine swap with new head gasket and upgraded components, 12-month warranty
Suitability
If overheating has caused cylinder head or block damage
1 - 2 daysAll prices are indicative UK market ranges based on current UK specialist supplier data.| Repair Tier | Dealer (Parts + Labour) | Specialist (Parts + Labour) | What It Involves | Suitability | Estimated Time |
|---|---|---|---|---|---|
 Minor - Cooling system diagnostics Minor | £150-£300 | £100-£200 | Pressure test, coolant system inspection, leak detection | First step - confirms whether head gasket is the cause | 1 - 2 days |
 Major - Head gasket replacement Best Value | £1,500-£2,500 | £900-£1,600 | Cylinder head removal, skim if warped, new MLS gasket, timing reassembly | If caught before cylinder head damage occurs | 1 - 2 days |
Full Replacement - Rebuilt M111 engine Best Value | £4,000-£5,500 | £2,200-£3,400 | Complete engine swap with new head gasket and upgraded components, 12-month warranty | If overheating has caused cylinder head or block damage | 1 - 2 days |
Vehicle Value Check
Vehicle Value Check
A typical 1996-2004 SLK 200 or 230 Kompressor is worth approximately £3,000-£8,000 depending on condition and mileage. These classic roadsters are appreciating assets for well-maintained examples, making engine replacement a justifiable investment for enthusiasts preserving their vehicles.
Our Recommendation
Our Recommendation
If your SLK Kompressor shows signs of coolant loss or overheating, have the head gasket inspected immediately. Replacing the head gasket with an upgraded MLS (multi-layer steel) unit at a specialist is significantly cheaper than dealer rates. If the engine has been overheated, a full rebuilt M111 engine with a new head gasket and upgraded components is the only safe option.
Don't Let Head Gasket Failure, Timing Chain Stretch, or Supercharger Issues Write Off Your Mercedes SLK 200 or 230 Kompressor
Whether you're facing M111 head gasket failure on your classic SLK Kompressor or M271 timing chain issues on your R171, EnginesMarket makes it simple to compare quotes from trusted UK Mercedes petrol specialists. Every rebuilt engine in our network carries upgraded components addressing the original design weakness - MLS head gaskets, reinforced timing chains, rebuilt superchargers, and fresh seals - plus a minimum 12-month unlimited mileage warranty with nationwide delivery and supply & fit options. Don't pay main dealer premiums. Compare prices from independent Mercedes specialists who know these supercharged engines inside out.
Compare rebuilt M111 Mercedes SLK 200/230 Kompressor engine prices
12-Month Minimum
UK Specialists Vetted
Best Price GuidanceImportant Information
Important Information
"All prices are indicative UK market ranges based on historical quote data and repair requests from our network of engine specialists. Dealer pricing is estimated based on published main dealer labour rates and genuine OEM parts pricing. Specialist pricing reflects actual quote data from EnginesMarket's UK network. Actual costs vary depending on damage severity, vehicle condition, variant, and workshop location within the UK. Use our free comparison tool to get tailored quotes for your specific Mercedes SLK 200 Kompressor or 230 Kompressor. Every engine supplied through EnginesMarket carries a minimum 12-month unlimited mileage warranty - always confirm exact terms with your chosen supplier."
Mercedes Benz SLK 200/230 Kompressor Engine ReplacementFrequently Asked Questions
Question 1How much does a Mercedes SLK 200 or 230 Kompressor engine replacement cost in the UK-
Short summary: A rebuilt M111 engine for the SLK 200 or 230 Kompressor costs £2,000-£3,400 supply-only; a rebuilt M271 engine for the R171 SLK 200 Kompressor costs £2,400-£3,600 supply-only. Fitting adds £800-£1,500 depending on complexity - supercharged engine work requires specialist knowledge.
- SLK 200 Kompressor (M111.943): rebuilt unit £2,000-£3,000; used engine from £800
- SLK 230 Kompressor (M111.973): rebuilt unit £2,200-£3,200; used engine from £900
- SLK 230 Kompressor (M111.983): rebuilt unit £2,300-£3,400; used engine from £1,000
- SLK 200 Kompressor (M271.944): rebuilt unit £2,200-£3,400; used engine from £1,000
- M111 head gasket replacement: £900-£1,600 at specialist
- M271 timing chain replacement: £1,200-£1,800 at specialist
Question 2What are the signs of head gasket failure on a Mercedes SLK 200 or 230 Kompressor-
Short summary: Coolant loss, overheating, white smoke from the exhaust, and oil in the coolant are the classic warning signs on the M111 engine. The original Victor Reinz fibre head gasket can fail with age, particularly between cylinders 3 and 4.
- Coolant loss without visible external leaks
- Engine overheating or temperature gauge fluctuation
- White smoke from the exhaust
- Oil in the coolant or coolant in the oil
- Bubbles in the radiator or expansion tank
- If caught early, head gasket replacement costs £900-£1,600 at specialist
Question 3What are the signs of timing chain failure on a Mercedes SLK 200 Kompressor (M271)-
Short summary: A rattling noise on cold start is the classic warning sign on the M271 engine. The timing chain can stretch over time, especially on earlier models, and the plastic timing chain guides can wear down.
- Rattling noise on cold start lasting 1-3 seconds - earliest warning
- Check engine light with cam/crank correlation codes
- Rough idle or poor acceleration
- Metallic debris in the oil (severe cases)
- If caught early, timing chain replacement costs £1,200-£1,800 at specialist
Question 4Is the Mercedes SLK 200 or 230 Kompressor engine reliable-
Short summary: The M111 engine is widely regarded as very solid and reliable, with the head gasket being the main weakness. The M271 engine has a reputation for timing chain issues, but otherwise is a reliable powerplant.
- M111 is considered a robust and reliable engine
- M111 head gasket failure is the most significant weakness
- M271 timing chain stretch is the main concern - early intervention is key
- Regular oil changes with correct spec oil are essential for both engines
Question 5How long do Mercedes SLK 200 and 230 Kompressor engines last-
Short summary: Properly maintained M111 engines routinely reach 150,000-200,000 miles before major work. The M271 can achieve similar mileage but may require timing chain attention between 60,000-100,000 miles.
- M111 (SLK 200/230 Kompressor): 150,000-200,000 miles with regular servicing
- M271 (SLK 200 Kompressor): 150,000-200,000 miles - timing chain inspection from 60k miles
- Head gasket inspection recommended from 80,000 miles on M111
- Service interval is 10,000 miles or 12 months - use Mercedes-spec MB 229.5 oil
Question 6Is it worth replacing the engine in my Mercedes SLK 200 or 230 Kompressor-
Short summary: Yes, if the SLK is otherwise in good condition with no rust or major transmission faults. A rebuilt M111 costs £2,000-£3,400 - far less than replacing a £3,000-£12,000 vehicle. Classic SLK values remain strong for well-maintained examples, making engine replacement a worthwhile investment.
- SLK 200/230 Kompressor values: £3,000-£12,000 depending on condition and mileage
- Rebuilt engine with upgraded components fixes original weak points
- Supply & fit typically £2,800-£5,000 depending on engine code
- New engine includes 12-month unlimited mileage warranty
Why Choose UsCompare Mercedes SLK 200/230 KompressorEngine PricesToday
500+ M111 and M271 supercharged engines supplied through our network
12-Month Warranty on every rebuilt SLK 200 and 230 Kompressor engine
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supply & fit available for M111 and M271
Comparing quotes for your Mercedes SLK 200 or 230 Kompressor is completely free, with no obligation and no pressure. Enter your registration above to get tailored quotes from UK Mercedes petrol specialists who understand the M111 and M271 supercharged engines inside out. Whether you need a used engine, a reconditioned unit, or a full rebuilt engine with upgraded head gaskets, timing chains, and supercharger components, we'll connect you with the right specialist for your exact SLK - with a minimum 12-month warranty on every engine supplied.
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