MERCEDES W176 Parts Catalogue & A-CLASS Aftermarket

W176 Parts Overview by Model Variant MERCEDES W176 Parts Catalogue PDF

The Mercedes-Benz W176 A-Class (2012–2018) includes a wide range of model variants such as A180, A200, A220, A250, and the high-performance A45 AMG. While these models share the same chassis platform, they differ significantly in engine configurations, suspension setups, brake systems, and drivetrain components. Below is a breakdown of key parts and how they vary across models.

1. A180 / A200 – Entry-Level Models

Engine Components:
Powered by smaller turbocharged M270 engines, common components include throttle body, intake manifold, EGR valve, engine mounts, and oil filters.

Suspension System:
Fitted with standard comfort suspension; includes basic shock absorbers, control arms, and rubber bushings.

Brake System:
Standard brake disc dimensions (Front: 276mm / Rear: 259mm), with single-piston calipers.

Transmission:
Typically equipped with 6-speed manual or 7-speed dual-clutch (7G-DCT) gearbox. Related parts include clutch kit, transmission mounts, and control modules.

2. A220 / A250 – Mid-Range Sport Models

Engine Components:
Higher-output versions of the M270 engine (1.6L or 2.0L turbo). Features include upgraded intercooler, turbocharger, water pump, and timing chain set.

Suspension System:
Sport-tuned suspension with firmer dampers and thicker anti-roll bars.

Brake System:
Larger front discs (up to 296mm), some models fitted with ventilated or perforated discs.

Electronics:
Additional features like drive mode selectors and upgraded stability control systems require specific ECUs and sensors.

3. A45 AMG – High-Performance Variant

Engine Components:
Equipped with the M133 2.0L turbocharged AMG engine. Exclusive parts include forged pistons, AMG-specific intake manifold, larger turbo, and aluminum oil pan.

Cooling & Exhaust:
Enhanced cooling systems including oil coolers, high-capacity radiators, and AMG performance exhaust with electronic flaps.

Suspension System:
AMG performance suspension with sport-tuned shocks, reinforced ball joints, and aluminum control arms.

Brake System:
High-performance brakes with larger 350mm drilled rotors and 4-piston AMG calipers.

Drivetrain:
4MATIC all-wheel-drive system with a reinforced rear differential, upgraded half-shafts, and a unique propeller shaft.

Shared Components Across Models

Body Parts:
Many components like headlights, door shells, and windshields are interchangeable across the W176 lineup. AMG versions have unique bumpers and trim kits.

Air Conditioning:
Most models share A/C compressors, condensers, and blower motors, although AMG models may use upgraded variants.

Electrical System:
Instrument clusters, wiring looms, and central modules share common layouts, though software and option codes may differ.

Conclusion

Although the W176 A-Class models share a unified chassis and design language, the parts installed in each model differ based on performance level and trim. Understanding these differences is essential for accurate parts sourcing, repairs, and upgrades.

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