Engines Market

Mercedes CLK 230/320 Petrol Specialists

Mercedes Benz CLK 230/320 Petrol Engine Replacement Compare Prices & Get Quotes

Get quotes today from trusted UK Mercedes Benz CLK 230 and CLK 320 petrol engine specialists. Compare prices on reconditioned, rebuilt and used M111 and M112 engines - supply & fit available nationwide.

Supply & Fit Available
12-Month Warranty
Nationwide Delivery
100+ Suppliers
Mercedes Benz CLK 230/320 Petrol Engine
from£1,100 to £2,500
  • Usedfrom £900
  • Reconditionedfrom £1,200
  • Common codesM111.973, M111.975, M112.940
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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 CLK 230/320 Petrol Engine History & Specs at a Glance

The Mercedes CLK 230 Kompressor and CLK 320 were the performance pillars of the first-generation C208 CLK range from 1997 to 2002. The CLK 230 Kompressor delivered 193 hp via a supercharged 2.3-litre four-cylinder M111 engine, while the CLK 320 offered a silky-smooth 218 hp from its 3.2-litre M112 V6. Both engines were available in coupé (C208) and cabriolet (A208) body styles.

Mercedes CLK 230/320 Petrol
  1. 1997

    CLK 230 Kompressor launched with M111.973 2.3L supercharged four-cylinder, 193 hp, 280 Nm torque

  2. 1997

    CLK 320 launched with M112.940 3.2L naturally aspirated V6, 218 hp, 308 Nm torque

  3. 1998

    Cabriolet (A208) variants introduced for both CLK 230 and CLK 320

  4. 2000

    Facelift: CLK 230 Kompressor upgraded to M111.975 with 197 hp

  5. 2002

    C208 production ends; CLK 230 and CLK 320 replaced by C209 generation engines

Every petrol engine fitted to the Mercedes CLK 230 Kompressor and CLK 320 is covered below, with UK rebuilt pricing and known failure points.

Engine Codes & Pricing

Mercedes CLK 230/320 Petrol Engine Codes Specifications & Replacement Cost

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

M111 E23 ML — 2.3L Supercharged Petrol (1997-2002) engine

M111 E23 ML — 2.3L Supercharged Petrol (1997-2002)

Power Output
193 hp (M111.973, 1997-2000) / 197 hp (M111.975, 2000-2002)
Torque
280 Nm @ 2,500-4,800 rpm
Displacement
2,295 cc
Bore x Stroke
90.9 x 88.4 mm
Compression Ratio
8.8:1
Valve Train
4-cylinder in-line, 2 overhead camshafts, double roller chain drive
Fuel System
Supercharged with intercooling, Bosch ME engine management
Years Fitted
1997-2002

Can’t find your exact engine code?-> Get quotes for M111 E23 ML Mercedes CLK 230 Kompressor engine replacement

-> Get quotes for M111 E23 ML Mercedes CLK 230 Kompressor engine replacement

Common Problems

Mercedes CLK 230/320 Petrol Engine Problems Repair Cost vs Replacement

The Mercedes CLK 230 Kompressor and CLK 320 are powered by two of Mercedes' most respected engines of the era - the supercharged M111 four-cylinder and the naturally aspirated M112 V6. Both are generally robust and reliable when properly maintained. However, age-related issues do arise: the M111 suffers from timing chain rattle and supercharger clutch wear, while the M112 is known for crankshaft position sensor failure and oil consumption from worn valve stem seals. Every rebuilt engine supplied through EnginesMarket includes upgraded components designed to address the original failure point - plus a minimum 12-month unlimited mileage warranty.

Common failure points and repair options

Timing Chain Rattle

Affected
Mercedes CLK 230 Kompressor (M111 E23 ML, 1997-2002)
Typical failure mileage
80,000-120,000 miles
Root cause
The timing chain tensioner can lose hydraulic pressure, allowing the chain to slacken and produce a rattling noise on startup. Incorrect engine oil grade can accelerate chain wear. The camshaft adjuster can also fail, producing a clicking or rattling noise.

Repair options

Repair tierDealer priceSpecialist price
Minor - Camshaft Adjuster Replacement£400-£700£250-£450
Intermediate - Timing Chain & Tensioner Replacement£1,200-£1,800£800-£1,300
Full Replacement - Rebuilt Engine£3,000-£4,500£2,000-£3,000
Our recommendation
Rattling on cold start is the early warning sign. Don't ignore it - specialist timing chain replacement at £800-£1,300 resolves the issue if done promptly. The M111 is otherwise a robust engine, and replacing the timing chain before failure can extend engine life significantly. If the chain has already slipped, a rebuilt engine with upgraded timing components is the only safe option.
-> Compare rebuilt M111 Mercedes CLK 230 Kompressor engine prices

Supercharger Clutch Failure

Affected
Mercedes CLK 230 Kompressor (M111 E23 ML, 1997-2002)
Typical failure mileage
80,000-150,000 miles
Root cause
The supercharger (Kompressor) magnetic clutch bearing wears out, producing a squealing or rattling noise. The clutch can also fail electrically due to corroded contacts or a faulty relay. Symptoms include loss of power, whistling or squealing noises on acceleration, and fault codes P1525 or P0443.

Repair options

Repair tierDealer priceSpecialist price
Minor - Supercharger Clutch Replacement£400-£700£250-£500
Intermediate - Supercharger Rebuild£1,200-£2,000£500-£900
Full Replacement - Rebuilt Engine£3,000-£4,500£2,000-£3,000
Our recommendation
The M111 Kompressor engine is otherwise robust. On a CLK 230 with a failed supercharger but otherwise healthy engine, specialist clutch replacement for £250-£500 or a full supercharger rebuild for £500-£900 is the right answer - far more cost-effective than replacing the whole engine. However, if the supercharger has failed catastrophically and sent debris into the engine, a replacement engine may be required.
-> Get quotes for M111 supercharger repair for your Mercedes CLK 230 Kompressor

Crankshaft Position Sensor Failure

Affected
Mercedes CLK 320 (M112 E32, 1997-2002)
Typical failure mileage
80,000-120,000 miles
Root cause
The crankshaft position sensor fails due to heat cycling, causing internal wiring to break. Symptoms include the engine stalling when hot, difficulty restarting after 5-15 minutes, and no fault codes stored. The sensor is located at the back of the engine and is tricky to access.

Repair options

Repair tierDealer priceSpecialist price
Minor - Crankshaft Position Sensor Replacement£300-£500£150-£300
Intermediate - Full Engine Electrical Inspection£500-£800£300-£500
Full Replacement - Rebuilt Engine£3,500-£5,500£2,500-£4,000
Our recommendation
The M112 V6 is widely regarded as one of Mercedes' most reliable engines. Crankshaft position sensor failure is the most common issue and is easily fixed. If your CLK 320 stalls when hot and won't restart for 5-15 minutes, start with the CPS - it's a £150-£300 specialist fix. The M112 engine is otherwise robust and, with proper maintenance, can exceed 150,000-200,000 miles.
-> Compare rebuilt M112 Mercedes CLK 320 engine prices

Oil Consumption

Affected
Mercedes CLK 320 (M112 E32, 1997-2002)
Typical failure mileage
100,000-150,000 miles
Root cause
Over time, valve stem seals harden and crack, allowing oil to seep past the valve guides and into the combustion chambers, where it is burned. Symptoms include blue smoke on startup, increased oil consumption, and in severe cases, fouled spark plugs.

Repair options

Repair tierDealer priceSpecialist price
Minor - Valve Stem Seal Replacement£1,500-£2,500£1,000-£1,800
Full Replacement - Rebuilt Engine£3,500-£5,500£2,500-£4,000
Our recommendation
Oil consumption on the M112 is typically due to worn valve stem seals - not piston rings. If you're burning oil but the engine runs smoothly, specialist valve stem seal replacement at £1,000-£1,800 resolves the issue. The M112 is otherwise bulletproof, so it's worth fixing rather than replacing the entire engine.
-> Get quotes for M112 valve stem seal repair for your Mercedes CLK 320

Don't Let Engine Failure Write Off Your Mercedes CLK 230/320 Petrol

Engine failure on a CLK 230 Kompressor or CLK 320 doesn't have to mean the end of the car. Whether you're dealing with M111 timing chain rattle, supercharger clutch failure, or M112 crankshaft position sensor issues, EnginesMarket makes it simple to compare prices from trusted UK Mercedes CLK petrol specialists. Every rebuilt engine includes upgraded components designed to prevent the original failure from recurring, backed by a minimum 12-month unlimited mileage warranty. Compare prices today and get back on the road without the main dealer premium.

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FAQ

Mercedes CLK 230/320 Petrol Engine ReplacementFrequently Asked Questions

Everything Mercedes Benz CLK 230/320 Petrol owners usually ask before choosing a rebuilt, reconditioned or used replacement engine.

Why Choose Us

Compare Mercedes CLK 230/320 Petrol Engine Prices Today

Comparing quotes for your Mercedes CLK 230 Kompressor or CLK 320 petrol engine replacement is free, quick and carries no obligation. Enter your registration above to get matched with vetted UK specialists who stock the exact M111 or M112 engine for your CLK - whether you need a used unit, a reconditioned engine or a fully rebuilt motor with a 12-month warranty. Get back on the road with confidence, without the main dealer premium.

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