The Mercedes-Benz Progressive Line Diffusor upgrade kit A-Class W177, part number W177-Prog-Dif-1, supports scheduled maintenance or replacement work where the exact Mercedes-Benz specification matters. This independent review turns the available catalogue data into practical compatibility, buying and installation checks.
A Mercedes-Benz part should be identified by its complete number and verified against the vehicle or intended use. Names and photographs help with recognition, but they cannot account for production changes, equipment codes or later part-number supersessions.
Mercedes-Benz Progressive Line Diffusor upgrade kit A-Class W177 W177-Prog-Dif-1 overview
- Part number: W177-Prog-Dif-1
- Product: Progressive Line Diffusor upgrade kit A-Class W177
- Catalogue category: spoilers & diffusers
- Review focus: specification, compatibility, fitment and practical ownership
Key specifications and catalogue details
- Brand: Mercedes-Benz
- Articlenumber: W177-Prog-Dif-1
- Mercedes-Benz part number: W177-Prog-Dif-1
- Catalogue category: spoilers & diffusers
- Source-listed price: €311.99
The source catalogue showed a special price of €311.99, compared with a regular price of €318.41, when the data was collected. Prices, tax treatment and availability can change, so this figure is a historical reference rather than a permanent offer.
Compatibility checks before ordering
Confirm the part number, fluid approval or service specification against the VIN and current workshop information. Colour, packaging and a broad model description are not reliable substitutes for the approved specification.
Ask the seller or a Mercedes-Benz parts specialist to verify W177-Prog-Dif-1 against the current electronic parts catalogue. Also compare dimensions, colour, mounting points, connectors and included hardware with the item already fitted or the accessory instructions.
Installation and practical use
Follow the model-specific workshop procedure and all safety precautions. Fluids and safety-related components should be handled by a qualified workshop when the owner does not have the correct equipment or service data.
Inspect the delivery before fitting it and retain the packaging until compatibility and operation have been confirmed. Stop the installation if the connectors, mounting points or dimensions differ from the vehicle.
Who is this product for?
It is most relevant to an owner, restorer or workshop that has already identified the exact Mercedes-Benz number or is using it during a VIN-based parts search. It is not a safe speculative purchase based only on a similar photograph.
Verdict
Mercedes-Benz Progressive Line Diffusor upgrade kit A-Class W177 W177-Prog-Dif-1 is worth considering when its number and specification match the intended application. The final decision should be based on verified compatibility, the included parts and the current delivered price.
Continue your Mercedes-Benz research
Start with the Popular Mercedes Products hub, consult the Mercedes-Benz buying guides, and use our maintenance and repair resources for broader ownership context.
Two closely related product reviews:
- Mercedes-Benz rear diffusor upgrade kit S-Class W222 black 4 pipes chrome W222-Diffusor-s-4fc Review
- Mercedes-Benz Rear spoiler A-Class V177 sedan A1777930400 Review
Editorial note: specifications, prices, supersessions and compatibility can change. Verify current information with the seller or a Mercedes-Benz parts specialist before purchase or installation.
