{"product_id":"mercedes-kraftstoffpumpenrelais-a0025459205-w126-260-se-300-se-300-sel-automatik","title":"Mercedes fuel pump relay A0025459205 W126 260 SE 300 SE 300 SEL automatic","description":"\u003cdiv style=\"background:#242833;border-radius:8px;padding:18px 20px;margin:0 0 14px;color:#ffffff;\"\u003e\n\u003cp style=\"margin:0 0 8px;\"\u003e\u003cstrong style=\"color:#c69a3a;\"\u003eGenuine Mercedes-Benz fuel pump relay A0025459205 for the S-Class W126 with automatic transmission (260 SE, 300 SE, 300 SEL).\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"margin:0;color:#cfd3dc;\"\u003eGenuine Mercedes component  ·  Model-year specific 09\/1988 – 08\/1989  ·  \u003cstrong style=\"color:#c69a3a;\"\u003eAutomatic transmission version\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#f5f6f8;border-left:4px solid #c69a3a;border-radius:8px;padding:14px 18px;margin:0 0 16px;\"\u003e\n\u003cp style=\"margin:0 0 6px;font-weight:700;\"\u003eCondition of this part\u003c\/p\u003e\n\u003cp style=\"margin:0;\"\u003eUsed genuine Mercedes relay. As no test bench is available, it is sold untested. The housing shows slight storage marks, the label is fully legible, and the connector pins have a slight patina. No rust, no corrosion, no breakage.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch3 style=\"margin:22px 0 8px;\"\u003eFunction and location\u003c\/h3\u003e\n\u003cp\u003eThe fuel pump relay switches the KE-Jetronic's electric fuel pump and only enables it when an engine speed signal is present – with the engine stopped, delivery is cut off even with the ignition on. It also handles the cold-start enrichment, supplies the oxygen sensor heater, and limits engine speed at 6450\/min; when this limit speed is reached, kickdown is deactivated.\u003c\/p\u003e\n\u003cp\u003eIt is installed in the relay and control unit carrier in the engine bay on the bulkhead, plugged in next to the overvoltage protection relay and other control relays.\u003c\/p\u003e\n\u003ch3 style=\"margin:22px 0 8px;\"\u003eHow can you tell if a fuel pump relay is faulty?\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eEngine does not start, because the fuel pump is not enabled\u003c\/li\u003e\n\u003cli\u003eEngine suddenly cuts out while driving\u003c\/li\u003e\n\u003cli\u003eStarting problems with a cold engine due to missing cold-start enrichment\u003c\/li\u003e\n\u003cli\u003eOxygen sensor heater remains non-functional\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin:22px 0 8px;\"\u003eCompatible vehicles\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eMercedes-Benz W126 S-Class, 09\/1988 – 08\/1989, M103 engine, automatic transmission only, rev limit 6450\/min:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e260 SE (126.020)\u003c\/li\u003e\n\u003cli\u003e300 SE (126.024)\u003c\/li\u003e\n\u003cli\u003e300 SEL (126.025)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin:22px 0 8px;\"\u003ePart numbers\u003c\/h3\u003e\n\u003cp\u003eThe original part number of this relay is A0025459205 for the automatic transmission version. For context: the manual transmission version in the same period carries the number 002 545 93 05. For the V8 models 420, 500, and 560, 002 545 33 05, 002 545 16 05, 003 545 18 05, 003 545 01 05, and 003 545 25 05 apply. Earlier W126 model years before 09\/1988 use 002 545 27 05 (06\/1985 – 08\/1986) or 002 545 52 05 (08\/1986 – 08\/1988); later model years from 09\/1989 use the number 003 545 17 05, and from 01\/1990 003 545 24 05.\u003c\/p\u003e\n\u003cdiv style=\"background:#f5f6f8;border-left:4px solid #c69a3a;border-radius:8px;padding:14px 18px;margin:0 0 16px;\"\u003e\n\u003cp style=\"margin:0 0 6px;font-weight:700;\"\u003e⚠ Important: compare the part number before buying\u003c\/p\u003e\n\u003cp style=\"margin:0 0 6px;\"\u003eThis relay is the version for automatic transmission. For manual transmission in the same period, 002 545 93 05 applies. Please compare the number of your old relay 1:1 – dealer catalogues sometimes also list the same number for the W124, W201, and R107; the model-year-specific assignment documented is for the W126.\u003c\/p\u003e\n\u003cp style=\"margin:0 0 4px;font-weight:700;\"\u003eDoes not fit:\u003c\/p\u003e\n\u003cul style=\"margin:0;padding-left:20px;\"\u003e\n\u003cli\u003eManual transmission version – 002 545 93 05 there\u003c\/li\u003e\n\u003cli\u003eV8 models 420, 500, and 560 – 002 545 33 05, 002 545 16 05, 003 545 18 05, 003 545 01 05, 003 545 25 05 there\u003c\/li\u003e\n\u003cli\u003eW126 before 09\/1988 – 002 545 27 05 (06\/85 – 08\/86) and 002 545 52 05 (08\/86 – 08\/88) there\u003c\/li\u003e\n\u003cli\u003eW126 from 09\/1989 – 003 545 17 05 there, from 01\/1990 003 545 24 05\u003c\/li\u003e\n\u003cli\u003eEarly M110, M116, and M117 vehicles with a square relay design\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this part fit your car?\u003c\/strong\u003e Send us the VIN (chassis number) and model year – we'll check it for free: \u003ca href=\"tel:+491798991069\"\u003e0179 8991069\u003c\/a\u003e (Mon–Fri 8 am–6 pm) or via our \u003ca href=\"\/en\/pages\/contact?thema=Ersatzteil\"\u003econtact form\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch3 style=\"margin:22px 0 8px;\"\u003eFAQ\u003c\/h3\u003e\n\u003cp style=\"margin:0 0 4px;\"\u003e\u003cstrong\u003eIs the relay new or used?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"margin:0 0 12px;\"\u003eThis is a used genuine Mercedes relay. As no test bench is available, it is sold untested; externally it shows slight storage marks and a light patina on the connector pins, but is free of rust, corrosion, and breakage.\u003c\/p\u003e\n\u003cp style=\"margin:0 0 4px;\"\u003e\u003cstrong\u003eDoes this relay also fit manual transmission?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"margin:0 0 12px;\"\u003eNo. The number A0025459205 is intended exclusively for the automatic transmission version. For manual transmission in the same period, the number 002 545 93 05 applies.\u003c\/p\u003e\n\u003cp style=\"margin:0 0 4px;\"\u003e\u003cstrong\u003eWhat's included in the scope of delivery?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"margin:0 0 12px;\"\u003eThe exact scope of delivery can be seen in the product photos.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eRelated categories:\u003c\/strong\u003e \u003ca href=\"\/en\/collections\/relais\"\u003eRelays\u003c\/a\u003e, \u003ca href=\"\/en\/collections\/w126\"\u003eW126\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKFZTeile-Thot\u003c\/strong\u003e specialises in spare parts for Mercedes classic cars. Free shipping within Germany, 60-day return policy.\u003c\/p\u003e","brand":"Mercedes-Benz","offers":[{"title":"Default Title","offer_id":54960899129673,"sku":"90063","price":89.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0913\/5344\/8777\/files\/57_934e412c-8ffa-4d53-bfd9-0a77bf4da428.jpg?v=1787304272","url":"https:\/\/kfzteile-thot.de\/en\/products\/mercedes-kraftstoffpumpenrelais-a0025459205-w126-260-se-300-se-300-sel-automatik","provider":"KFZTeile-Thot","version":"1.0","type":"link"}