The Mercedes-Benz C-Class W203, specifically the C180 Kompressor with engine code 111.955, features a supercharged inline-4 engine that was part of Mercedes-Benz’s M111 engine family. Here’s a detailed description:

🔧 

Engine Overview: M111.955

• Engine Family: M111
• Engine Code: 111.955
• Type: Inline-4 (I4)
• Displacement: 1.8 liters (1796 cc)
• Induction: Supercharged (Kompressor)
• Fuel System: Multi-point fuel injection
• Aspiration: Forced induction (via an Eaton supercharger)
• Valvetrain: DOHC, 16-valve
• Block/Head Material: Cast iron block with aluminum head

⚙️ 

Performance Specs

• Power Output: ~143–163 hp (varied slightly by market and year)
• Torque: ~220–230 Nm
• 0–100 km/h (0–62 mph): ~9.3 seconds (depends on model variant and transmission)
• Top Speed: ~220 km/h (136 mph)

🛠️ Notable Features

• Kompressor: The supercharger helps increase power and torque, particularly at lower RPMs, improving acceleration and responsiveness.
• Sturdy Design: The M111 series is known for being durable with proper maintenance.
• Transmission Pairings: Typically mated with a 5-speed automatic or manual transmission.

⚠️ Common Issues (if you’re considering maintenance or purchase)

• Crankshaft position sensor failure
• Oil leaks from valve cover gasket
• Supercharger clutch wear
• Mass air flow (MAF) sensor issues
• Aging ignition coils and spark plugs

Let me know if you’d like wiring diagrams, torque specs, maintenance intervals, or tuning potential.