MERCEDES A CLASS W177 AMG FRONT BUMPER 2018-2023 A1778856100 &

Part number A1778856100. We take parts off vehicles every week, and this page is updated with a link straight to the part as soon as another one arrives.

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About part number A1778856100

This part is a front bumper cover, which forms the front outer body panel of the vehicle. It covers the crash structure and provides mounting points for the front grilles, badges, and lower trims. It protects the internal components from road debris and directs airflow into the engine bay and cooling radiators. When this part is fitted correctly, the front profile of the car looks complete, with even panel gaps against the bonnet, headlights, and front wings.

To confirm that this part is the correct match for your vehicle, you must check that the manufacturer part number matches A1778856100. On a component of this type, the part number is usually stamped or moulded into the inner plastic face on the reverse side of the panel. Matching this part number exactly is the only way to guarantee that the mounting points, sensor apertures, and trim cut-outs align properly.

A front bumper cover is typically replaced after absorbing an impact, suffering structural cracks, or sustaining heavy cosmetic damage. When fitting a replacement cover, you often need additional plastic rivets, mounting clips, and lower splash shield fasteners to complete the installation securely.

About this kind of part: bumper covers

A bumper cover is the painted plastic skin across the front or the rear of a car. It is not a structural part. Behind it sit a foam or honeycomb absorber and a steel or aluminium reinforcement bar, and those are what take an impact. The cover carries the grille apertures, the number plate plinth and the openings for parking sensors, washer jets and tow eyes, so one model can take several different covers depending on how it was specified when new.

Why people replace one

  • A knock in a car park or a light collision has cracked or torn the plastic. A tear can be plastic-welded, but it rarely returns to a finish that will take paint without showing.
  • The paint has faded or crazed differently from the panels around it. A bumper flexes and sits low in the spray from the road, so it ages faster than a wing.
  • The mounting tabs along the top edge or inside the wheel arches have snapped, so the cover stands proud of the panel next to it.
  • An earlier repair has been filled and has begun to lift.

Fitting it

  • It is held by screws along the top edge, screws or clips inside each wheel arch, and plastic nuts underneath the car.
  • Lamps, grilles, sensors, washer jets and the number plate plinth usually move across from the old cover.
  • A cover is supplied either in primer or in the colour it was sprayed when new. A matching finish needs the paint code from the car's own identification plate.
  • Parking sensors go back into their own openings, and the trim rings around them are often specific to the colour.

Making sure it is the right one

  • Match the part number moulded into the old cover rather than matching the shape. A facelift changes the number while the outline can look almost the same.
  • Check whether the car has parking sensors. A cover with no sensor openings cannot be used on a car that has them, and drilling one is not a repair.
  • Count the openings and compare them: fog lamp apertures, the tow eye cover and any camera or washer cut-out differ between trim levels on the same model.

What to look for in the photographs

A Part number — Moulded into the inside face, usually towards one end. This is the number to match against your own cover.
B Parking sensor openings — Either a row of openings across the face or none at all. This is what decides whether the cover will fit your car.
C Upper mounting tabs — The row of tabs along the top edge that screw to the slam panel. Look for any that are cracked or missing.
D Wheel arch returns — The ends that wrap around into the wheel arches. These are the first part to crack in a knock, and the easiest to overlook.
E Lamp and grille apertures — The openings for fog lamps, the grille and any camera or sensor. Hold them against your own cover before buying.

This section describes bumper covers parts in general. The numbers and the photographs above are this part.

Free next-day delivery in the United Kingdom Sent with DPD on a tracked, next-day service. Most mainland addresses are next day; the Highlands and Islands, Northern Ireland, the Channel Islands and the Isle of Man can take a day longer.

Returns Thirty days to change your mind, and we pay the return postage in the United Kingdom and Germany.

Trade and VAT C.E.J Haime Group Limited is VAT registered in England and Wales, and every order comes with a full VAT invoice.

Not sure it is the right part? Send us your registration or VIN and we will check this part number against your own vehicle before you buy.

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