OE 2115401717 Fitment Across Mercedes Chassis and Model Years
Introduction: OE 2115401717 is a Mercedes-Benz rear brake wear sensor with broad listed fitment, but the OE number, chassis code, and model year must be read together.
A parts counter conversation shows why this matters. One reader has a sensor box marked 2115401717, another has a registration showing W211, and a third assumes the part fits “a Mercedes” because the catalog says it covers hundreds of models. Those are three different pieces of information. The OE number identifies the replacement part, the chassis code narrows the platform family, and the model year catches changes within that family. Reading them together is the practical way to avoid treating one sensor as a universal Mercedes-Benz part.
What an OE Number and Chassis Code Each Tell a Parts Reader
An OE number and a chassis code answer different questions. The OE number tells a reader which replacement part is being discussed, while the chassis code tells a reader which Mercedes-Benz platform family the vehicle belongs to. Neither one is a full vehicle description on its own. A parts listing can be broad and still correct, but only when the reader keeps these identifiers in the right order. The OE number comes first because it anchors the part. The chassis code comes next because it groups models by platform period. The model year comes after that because a platform can run for many years and still carry running changes.
1. OE Numbers Identify a Replacement Part Rather Than a Whole Vehicle
OE 2115401717 identifies a specific replacement part number, not “every Mercedes-Benz. ” In the FREY Auto Parts listing, it is presented as a rear brake wear sensor with a retaining clip, FREY No 780700101, and a unit weight of 0.010 kg. Those details describe the part itself. They do not describe every vehicle that might use it. That distinction matters at the parts counter because a buyer can easily see a long compatibility list and read it as a vehicle-wide promise. The better reading is narrower: the OE number identifies the part family, and the compatibility list shows where that part family has been listed for use. A brake wear sensor supplier may publish a wide list because one part number can serve several model lines, but the OE number still points to one replacement item.
2. Chassis Codes Group Mercedes Models by Shared Platform Periods
Chassis codes such as W211, W212, W204, W203, W221, W220, W169, W245, and W166 group Mercedes-Benz models by platform period. Mercedes-Benz owner manuals use these factory-style names because they help distinguish one model generation from another. A W211 is not simply “an E-Class” in every parts conversation; it is a platform generation with its own production span and system changes. That is why a chassis code is more useful than a model name alone. It gives parts readers a shared reference point for the vehicle’s generation. When a listing says OE 2115401717 fits W211, W212, W204, and other chassis, it is telling the reader that the part has been associated with multiple platform families. It is not saying that every car in those families is identical. The product listing illustrates the spread clearly. FREY lists fitment to Mercedes-Benz and Maybach chassis including W221, W220, W212, W211, W203, W204, W169, W245, and W166. That spread covers several model classes and platform periods, from older S-Class and E-Class generations to C-Class, A-Class, B-Class, and M/GLE-related chassis. The listing count appears as 759 in one place and 766 in another, with model years spanning 1995–2023. That difference is visible and worth keeping in view. It shows why the final OE compatibility list and model-year data should control the fitment boundary, rather than a rounded claim that the sensor fits “all Mercedes. ”
Why One Rear Brake Wear Sensor Can Cover Many Mercedes Chassis
One rear brake wear sensor can cover many Mercedes chassis because brake wear sensing is not unique to one model line. Several platform families can share the same sensor interface, the same warning strategy, and the same replacement part number even when the cars look different from the outside. A C-Class, E-Class, and S-Class from different generations may use different body styles, engines, and trim levels, yet share a rear brake wear sensor family where the brake system design allows it. That is parts consolidation in practice: the vehicle range is wide, but the sensor requirement is narrow enough to be served by one part number. This is why a catalog can legitimately show OE 2115401717 against W211, W212, W204, W203, W221, W220, W169, W245, and W166 without turning the part into a universal Mercedes-Benz sensor. The key phrase is “where the rear brake system uses the same sensor interface and warning strategy. ” That condition explains both the breadth and the limit. Broad fitment comes from shared rear brake hardware across platform periods. The limit comes from the fact that not every Mercedes-Benz model uses the same rear brake setup. Model year, market version, trim, and optional equipment can change what is fitted to a specific car. A reader who sees W211, W212, and W204 in the same compatibility list should understand that the part number has been associated with those chassis families. The reader should not jump from that list to “every W211, W212, and W204 ever built. ” The OE number is the anchor, the chassis code is the platform filter, and the model year is the final narrowing step. This is also where the difference between an auto parts manufacturer catalog and a vehicle registration becomes useful. The catalog groups parts by OE number and chassis coverage. The registration identifies one specific car. A brake wear sensor supplier can list a part against many chassis because the supplier is describing coverage across a range. The reader’s job is to bring the specific vehicle back into the conversation. That is not a reason to distrust the listing; it is simply how parts coverage works. The listing gives the candidate part, and the chassis plus model year confirm whether that candidate belongs on the car in front of the reader.
Where Broad Fitment Stops and Model Year Matching Begins
Broad fitment stops when the conversation moves from “listed chassis” to “this specific car. ” The chassis code narrows the platform, but it does not capture every production change inside that platform. A W212 built in one model year may differ from a later W212 in ways that affect parts selection. The same is true for W204, W221, and the other chassis named in the listing. Model year matching begins at that point because the reader is no longer asking whether the sensor family covers a platform period. The reader is asking whether this particular vehicle’s rear brake wear sensor requirement matches OE 2115401717. That is a narrower question, and it is the right one. The 1995–2023 span in the listing shows why the model year cannot be skipped. That is a long coverage window across multiple Mercedes-Benz and Maybach chassis generations. A part number can remain valid across that window only because the listing is grouping many applications under one OE reference. It is not evidence that every model year within the window uses the same sensor in the same way. The practical reading is straightforward: start with OE 2115401717, check the chassis code against the listed families, then use the model year to confirm the application. If the final compatibility list and model-year data disagree with a general statement, the final list wins. That is the boundary that keeps a broad listing from becoming an all-Mercedes claim. For a parts selection researcher, this is the useful takeaway. OE 2115401717 has broad listed fitment across Mercedes-Benz and Maybach chassis, including W221, W220, W212, W211, W203, W204, W169, W245, and W166. It is a rear brake wear sensor listed with a retaining clip, FREY No 780700101, at 0.010 kg. The listing count appears as 759 or 766 depending on the source, with model years spanning 1995–2023. Those facts make the sensor a strong candidate for a wide range of Mercedes-Benz applications. They do not make it a universal part. The OE number, chassis code, and model year are three separate filters, and the best fitment decision comes from reading all three together.
Conclusion
OE 2115401717 is best understood as a part number with broad Mercedes-Benz and Maybach chassis coverage, not as a universal Mercedes-Benz sensor. The OE number identifies the replacement part, the chassis code groups models by platform period, and the model year catches the changes that a chassis code alone cannot show. FREY Auto Parts lists this rear brake wear sensor with a retaining clip, FREY No 780700101, at 0.010 kg, with fitment to W221, W220, W212, W211, W203, W204, W169, W245, and W166. The 759 versus 766 listing difference and the 1995–2023 model-year span are useful reminders that the final compatibility list and model-year data control the fitment boundary. Reading those three identifiers together is the clearest way to avoid assuming that one sensor fits every Mercedes-Benz model.
FAQ
Q: What does OE 2115401717 fit on a Mercedes-Benz?
A: OE 2115401717 is listed as a rear brake wear sensor for Mercedes-Benz and Maybach chassis including W221, W220, W212, W211, W203, W204, W169, W245, and W166. The listing shows a broad model range with model years spanning 1995–2023, while the final OE compatibility list and model-year data set the exact fitment boundary.
Q: Why can one brake wear sensor fit W211, W212, and W204 models?
A: One brake wear sensor can fit W211, W212, and W204 models because those platform families can share the same rear brake wear sensor interface and warning strategy. The part number is grouped across multiple chassis periods where the rear brake hardware allows the same sensor family to be used. That creates broad coverage, but it still does not make the sensor universal across every Mercedes-Benz model.
Q: Does a matching chassis code mean the sensor fits every model year?
A: No. A matching chassis code narrows the vehicle to a platform family, but model year can still change the exact application. A W212, W204, or W221 from one model year may not match every other vehicle in the same chassis family. Use the OE number, chassis code, and model year together, and let the final compatibility list and model-year data confirm the fit.
Sources / References
Mercedes-Benz USA Owner’s Manuals
Comments
Post a Comment