2-Pack 0025422319 5-Pin Green Relay, Compatible with Mercedes-Benz ML/GL (W164/X164) & S-Class (W221) — Replaces 0009828523, 0025427619, 4RA 007 791-52 — 12V Multi-Purpose/Air-Suspension/Starter

What it is: Aftermarket 12V, 5-pin mini ISO changeover relay (30/85/86/87/87a) in green housing; coil suppression as per OE design for clean switching and reduced back-EMF.Replaces OE numbers: A 002 542 23 19 (0025422319), A 000 982 85 23 (0009828523), A 002 542 76 19 (0025427619). Hardware marking often seen as 4RA 007 791-52.Typical functions by platform: Multi-purpose power relay — used by vehicle platforms for air-suspension compressor, starter/horn/fuel-pump or other high-load circuits depending on equipment.Locations: On W164/X164, installs in the engine-bay fuse/relay box (slots “G” and “I”). Always match the pin layout and the OE number on your original relay.When to replace: If the compressor does not start, or when replacing the air-suspension compressor, renew the relay to prevent contact-wear related no-start of the compressor.Selected compatibility: W164 ML-Class (2006–2011); X164 GL-Class (2007–2012); W221 S-Class (2007–2013, incl. S600, S63 AMG); W204 C-Class (C250 2012–2015, C300 2013–2014, C350 2011–2015, C63 AMG 2008–2015); W212 E-Class (E350/E400/E550 2010–2016). Verify by VIN and relay position.Notes: This product is not an OEM part; it is a compatible aftermarket replacement engineered to meet the functional requirements of the listed OE numbers.

• Specs & OE references — 12V mini ISO 5-pin changeover relay (30/85/86/87/87a), green housing; with coil suppression (per OE design). Replaces A 002 542 23 19 / 0025422319, A 000 982 85 23 / 0009828523 (supersession), and A 002 542 76 19 / 0025427619; hardware marking often cross-referenced as 4RA 007 791-52.
• Location & service tip — On W164/X164 the relay sits in the under-hood relay/fuse box (positions “G” and “I”). It’s commonly serviced with the air-suspension compressor; when the compressor is replaced, replacing this relay is recommended to avoid repeat failures.
• Compatibility — W164 / X164 SUVs — Compatible with ML-Class (2006–2011) ML320 CDI/BlueTEC, ML350, ML450 Hybrid, ML500/550, ML63 AMG; and GL-Class (2007–2012) GL320/350 CDI/BlueTEC, GL450, GL550 (confirm by VIN/slot).
• Compatibility — S-Class (W221) — Compatible with S-Class (2007–2013) including S600 and S63 AMG where used as multi-purpose / compressor / starter / horn relay depending on trim and option codes (verify by relay position and OE number on the original part).
• Additional coverage — C/E/CLS lines — Also listed against C-Class W204 (e.g., C250 2012–2015, C300 2013–2014, C350 2011–2015, C63 AMG 2008–2015) and E-Class W212 (E350/E400/E550 2010–2016) where equipped; usage varies by circuit (multi-purpose).
• Complementary parts (for bundled/related traffic) — Air-suspension compressor commonly paired with this relay on W164 (A 164 320 12 04) and on W221 (221 320 13 04 kit listings show pump+relay). Bundling the relay with the compressor helps ensure the compressor will engage reliably after service.