4RD 007 794-50 12V 40A 5-Pin SPDT Relay Compatible with Mercedes-Benz Sprinter 2500/3500 2001-2014, M-Class 1998-2005, G-Class 2013-2018, Replaces A0009828123 A0025427419

4RD007794-50 12V 40A 5-Pin Change-Over (SPDT) Automotive Relay Replacement relay matching the standard ISO mini footprint used across multiple Mercedes-Benz platforms. Designed for reliable control of high-load circuits in starter/ignition, fuel pump and fan applications when the original relay ages. SpecificationsCoil Voltage: 12 V DCContact Rating: 40 A (NO) / 20 A (NC) at automotive temperaturesContact Form: SPDT (change-over), 5-pinTerminals: ISO 6.3 mm blade, mini relay footprintSuppression: Integrated coil suppressionReplaces OE Part Numbers A0009828123; A0025427419; 0025423419; 0025421419; 0045450405; 0035452705. Please confirm by part number and existing relay markings before purchase. Typical Install LocationsEngine Compartment Fuse & Relay Box (e.g., M-Class W163/W164)Passenger-side instrument panel or footwell SAM module (e.g., G-Class W463)Seat-base fuse/relay holders (e.g., Sprinter T1N/NCV3)Symptoms This Relay Can AddressNo-crank / intermittent crank (starter control relay)Fuel pump inoperative / intermittent powerCooling or auxiliary fan inoperative / stuck-offWhat’s in the Box1 × 4RD007794-50 12V 40A SPDT relayCompatibility Guidance Use the year-by-year fitment in the bullets and match your existing OE part number. Vehicles may have multiple relays with similar footprints; verify slot and function in your fuse/relay chart before installation.

• SPEC & OE REFS — 12V DC, 40A/20A change-over (SPDT) 5-pin mini relay with suppression; ISO 6.3 mm blade terminals; standard automotive footprint. Replaces OE part numbers: A0009828123, A0025427419, 0025423419, 0025421419, 0045450405, 0035452705 (match by part number before ordering)
• INSTALL & SYMPTOMS — Typically mounted in fuse/relay modules (engine compartment, instrument panel or seat base per platform). Compatible with Mercedes-Benz circuits such as starter/ignition, fuel pump and fans; addressing no-crank/no-start, inoperative pump/fan or intermittent power when a relay ages.
• FITMENT (ML320) — Compatible with 1998 Mercedes-Benz ML320 Engine Compartment Fuse & Relay Box Relay; 1999 Mercedes-Benz ML320 Engine Compartment Fuse & Relay Box Relay; 2000 …; 2001 …; 2002 …; 2003 …. (W163 locations documented.)
• FITMENT (ML350 & ML430) — Compatible with 2003, 2004, 2005 Mercedes-Benz ML350 Engine Compartment Fuse & Relay Box Relay; 1999, 2000, 2001 Mercedes-Benz ML430 Engine Compartment Fuse & Relay Box Relay. (W163 locations documented.)
• FITMENT (ML500 & ML55 AMG) — Compatible with 2002, 2003, 2004, 2005 Mercedes-Benz ML500 Engine Compartment Fuse & Relay Box Relay; 2000, 2001, 2002, 2003 Mercedes-Benz ML55 AMG Engine Compartment Fuse & Relay Box Relay. (W163 locations documented.)
• FITMENT (Sprinter 2500, NCV3) — Compatible with 2010, 2011, 2012, 2013, 2014 Mercedes-Benz Sprinter 2500 Under Driver Seat Fuse & Relay Module Relay. (Years/engine family verified; under-seat location documented.)
• FITMENT (Sprinter 3500, NCV3) — Compatible with 2010, 2011, 2012, 2013, 2014 Mercedes-Benz Sprinter 3500 Under Driver Seat Fuse & Relay Module Relay.
• FITMENT (Sprinter 2500, T1N) — Compatible with 2001, 2002, 2003, 2004, 2005, 2006 Mercedes-Benz Sprinter 2500 Under Driver Seat Fuse & Relay Module Relay.
• FITMENT (Sprinter 3500, T1N) — Compatible with 2001, 2002, 2003, 2004, 2005, 2006 Mercedes-Benz Sprinter 3500 Under Driver Seat Fuse & Relay Module Relay.
• FITMENT (G-Class W463) — Compatible with 2013, 2014, 2015, 2016, 2017, 2018 Mercedes-Benz G550 Passenger Footwell Front SAM Fuse & Relay Box Relay; 2013-2018 Mercedes-Benz G63 AMG Passenger Footwell Front SAM Fuse & Relay Box Relay. (W463 locations documented.)