Standard Ignition RY-1094 Engine Cooling Fan Motor Relay

Engine Cooling Fan Relay for Mercedes-Benz

Standard Ignition RY-1094 is an engine cooling fan motor relay for Mercedes-Benz applications that use a 12-volt coolant fan relay circuit. It is built with a 4-terminal, male bullet connection layout and a square connector shape for direct replacement use in the cooling system electrical path.

Key Features

• Engine cooling fan motor relay for coolant fan control
• 12-volt electrical rating with 30 amp amperage capacity
• 4-terminal design with male bullet terminals
• Square connector shape for application-specific fitment
• Standard Ignition RY-1094 replacement part
• Cross-references Standard Ignition RY-1094, 20917, and 0015429619 for the same application

Detailed Description

This relay is used in Mercedes-Benz cooling fan circuits to switch power to the engine cooling fan motor when the system calls for fan operation. Standard Ignition RY-1094 is listed for a wide range of Mercedes-Benz models, including SL600, SL500, C220, C280, C36 AMG, SL320, E420, E320, E500, 400E, 400SEL, 500E, 500SEC, 500SEL, 500SL, 600SL, 400SE, 420SEL, 190E, 300D, 300SD, and 300TD. It also appears in high-speed engine fan and Fan No. 2 applications on select vehicles. If you are sourcing a Mercedes-Benz SL500 cooling fan relay or a Mercedes-Benz E500 high-speed engine fan relay, RY-1094 is the part number to verify against the original unit.

What It Helps Address

• Cooling fan not switching on at the proper temperature
• Intermittent radiator or engine fan operation
• Overheating caused by a failed fan relay
• Electrical relay failure in the coolant fan circuit
• Loss of high-speed engine fan function on listed Mercedes-Benz applications

Installation Notes and Tips

Verify the connector shape, terminal count, terminal type, and amperage rating before installation. Confirm the vehicle’s original relay part number and cooling fan circuit configuration, especially on models with high-speed engine fan or Fan No. 2 notes. This part is a direct electrical replacement for the listed Mercedes-Benz fitments, including 2000-2002 Mercedes-Benz SL600, 1997-1999 Mercedes-Benz SL500, and 1994-1996 Mercedes-Benz C280.

Quality Assurance

Standard Ignition is a recognized aftermarket brand for replacement electrical components. RY-1094 is specified as a 12-volt, 30 amp engine cooling fan motor relay built for the listed Mercedes-Benz applications and cross-reference numbers.