(A) Headlight use — fitment paragraph Headlight use — fits vehicles equipped with the 14-pin OE connector A0275459826 at the rear of the headlamp: S-Class (W222 2014-2020) S400/S450/S500 (S550)/S560/S600/S63/S65 incl. Maybach S560/S600; GL/GLS (X166 2013-2019) GL350/GL450/GL550/GL63, GLS450/GLS550/GLS63; E-Class (W212 2014-2016) E300/E350/E400/E550/E63 (LED/Bi-LED only); GLE (W166/C292 2016-2019) GLE400/GLE43/GLE500 (GLE550). Always verify by matching the 14-pin plug at the lamp.
(B) Fuel-pump use — fitment paragraph Fuel-pump use — the same 14-pin housing is also used at the in-tank fuel pump top-hat on select models: GL450; GLE400/GLE43/GLE500 (GLE550); GLS63; S-Class (W222) S400/S450/S500 (S550)/S560/S600/S63/S65; Maybach S560/S600. Use only if your vehicle's fuel module uses the 14-pin A0275459826 socket (some trims use different plugs).
(C) Possible/verify May also fit headlamps on C-Class (W205/W204) and GLK (X204) when equipped with a 14-pin rear lamp socket matching A0275459826; due to multiple lamp suppliers and pin-counts in these lines, please confirm by VIN or by visual plug match before ordering.
OE/Interchange numbers (housing/plug only; avoid host module PNs): A0275459826; 0275459826; 027-545-98-26; A 027 545 98 26. Common aftermarket/supplier references found in trade catalogs include 13687177 and CT14-0008M (supplier references, not OEM).
Mates to these assemblies (examples): Fuel system: 2224700694 (in-tank fuel pump module on select W166/W222 etc.). Headlamps: family numbers A212 820 **** for W212 E-Class LED/Xenon (e.g., 2128202239, 2128208159) and A222 820 **** for W222 S-Class LED (e.g., 2228208061, 2228201214). These are host assemblies; your pigtail does not replace them — it mates with their 14-pin socket.