Genuine MERCEDES a Class W177 Rear Bumper Tow Eye Cover White A1778852501 2019

Part number A1778852501. 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 A1778852501

A rear bumper tow eye cover is a small trim panel that clips into the rear bumper structure. It conceals the threaded mounting point used for the recovery towing eye, protecting the internal fixings from road dirt and moisture. When correctly installed, it sits flush with the surrounding bodywork, keeping the bumper looking neat and complete.

To ensure this component is correct for your vehicle, you must check that the part number stamped into the plastic on the back of your existing cover matches A1778852501 exactly. Do not rely on visual appearance alone, as shape and clip positions vary between different bumper designs. Matching the part number is the only way to guarantee a proper fit.

These covers are frequently replaced because they can fall out, become dislodged by impact, or get lost after the vehicle is towed. When fitting a replacement cover, you usually only need basic trim tools to press the retaining clips into place, though you may require matching paint if your bumper is a different shade.

About this kind of part: tow eye covers

A tow eye cover is the small painted flap or cap that hides the threaded towing point in a bumper. It is the smallest painted part on the outside of a car and the most frequently lost, because it is held by one or two plastic tabs and a short tether, and because it is removed only in the kind of situation where nobody is looking after small parts. It is painted to match the car, so a replacement either arrives in the correct colour already or needs spraying.

Why people replace one

  • The cover has been lost after a recovery or a tow, which is what almost all of them are replaced for.
  • A tab has snapped and the cover no longer clips flat, so it rattles or falls out at speed.
  • The tether has broken and the cover was dropped and not found.
  • A jet wash has lifted an unclipped cover out of the bumper.
  • The paint no longer matches because the cover is a different age from the bumper around it.

Fitting it

  • It pushes in from the outside until the tabs engage, and it comes out by pressing one edge in and easing the other out.
  • Where there is a tether, it hooks to a lug moulded inside the bumper opening before the cover is pushed home.
  • Fit it cold-side-out and press on the edges rather than the middle, which is where a stiff cover cracks.
  • A cover supplied in primer needs the paint code from the car's own identification plate to match the bumper.

Making sure it is the right one

  • Match the part number. The front cover and the rear cover of the same car are different parts, and so are the covers of different trim levels on one model.
  • Compare the shape of the opening, not just the size. A cover is contoured to the curve of the bumper it sits in and will not sit flat in a different one.
  • Check the tab pattern and whether yours has a tether lug. These change between a facelift and the version before it.
  • If the cover is supplied painted, treat the colour as a starting point rather than a match, because a used painted part has aged with its own car.

What to look for in the photographs

A Part number — Moulded into the inside face. On a part this small it is often the only way to tell two covers apart.
B Tabs — The clips around the inside edge. Check each one is whole, because a single broken tab is what loses the cover.
C Tether lug — The small loop or peg for the tether, where the car has one. Its presence or absence is part of what you are matching.
D Curvature — Look at the cover from the side. It is shaped to one bumper's curve, and a flat photograph hides that completely.
E Face finish — Whether it is painted or in primer, and how the paint has worn. This is the lowest, most stone-blasted part of the car.

This section describes tow eye 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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