Original Mercedes AMG A45 S Bumper w177 Front Rear

The “Predator” Stance | Panamericana Design | Quad Exhaust Diffuser

The A45 S AMG (W177) features the most aggressive bodywork in the A-Class lineup. Unlike the A35 or AMG-Line models, the A45 S utilizes a wider front track, which necessitates specific wide-body front fenders and a unique bumper assembly. It is the only W177 model to come factory-equipped with the Panamericana Grille and the signature round quad exhaust tips. Original Mercedes AMG A45 S Bumper w177 Front Rear

1. Front Bumper Assembly (A45 S)

The front end is dominated by the “Shark Nose” design and functional aerodynamics.

• Panamericana Grille: Features 15 vertical chrome or black slats. Note: The A45 S grille is physically wider than the A35 version and is not directly interchangeable without the A45 S bumper.

• Aerodynamic Flics (Code B26): High-gloss black “canards” on the outer air intakes that increase front-axle downforce.

   

• Wide-Body Integration: The bumper edges are flared to meet the wider A45 S aluminum fenders.

• Technical Support: Pre-drilled for 6x PDC sensors and the front 360° camera (Code 501).

2. Rear Bumper & Diffuser Assembly

The rear of the A45 S is defined by its massive diffuser and distinctive exhaust outlet shape.

• High-Gloss Diffuser: Features four vertical fins to optimize airflow from beneath the car.

• Quad Exhaust Tips: Two 90mm round tips on each side (total of 4). These are usually finished in Chrome or Black Chrome (Night Package).

• Rear Aero Flaps: Two-piece high-gloss black flaps located on the air outlets behind the rear wheel arches.

   

Technical Compatibility Matrix

Comparison: A45 S vs. A35 Bumper

Conversion Warning: If you are trying to make an A35 or A250 look like an A45 S, be aware:

• The Front: An original A45 S front bumper will not line up with standard A-Class fenders. You must also buy the wider A45 S front fenders and the inner wheel arch liners.

• The Rear: The A45 S rear diffuser is compatible with any AMG-Line (Code 772) rear bumper. This is the most popular “bolt-on” upgrade for A180-A35 owners.

   

Essential Parts List for Assembly

If purchasing a “take-off” set, ensure these components are included:

1. Front Bumper Skin: A1778855103 (typical part number base).

    

2. Panamericana Grille: A1778880300.

3. Front Aero Kit: Lower splitter and the 4 side flics (canards).

    

4. Rear Diffuser: The central plastic insert with the 4 fins.

5. Exhaust Tip Bezels: The metal quad-tips (these bolt to the diffuser, not the actual exhaust pipe).