Standard Ignition RY-1739 Computer Control Relay

Computer Control Relay for Mercedes-Benz Applications

Standard Ignition RY-1739 is a 12 V computer control relay built for electrical circuit management in select Mercedes-Benz vehicles. It uses a 5-terminal female connector with an oval shape and a 21-terminal male pin/female plug interface for the specified application.

Compatible With Mercedes-Benz SLK230, SLK32 AMG, SLK320, E320, and E420 applications across the listed model years, this relay supports multi-function control in the vehicle’s electrical system. Standard Ignition RY-1739 is a direct-fit replacement for the specified OE-style application.

Key Features

• Computer control relay for automotive electrical systems
• 12 V operating voltage
• 40 A amperage rating
• 5-terminal female connector with oval shape
• 21-terminal male pin / female plug terminal design
• Multi-function relay configuration
• Fits Mercedes-Benz SLK230, SLK32 AMG, SLK320, E320, and E420 applications

Detailed Description

Standard Ignition RY-1739 is engineered as a computer control relay for vehicles that rely on coordinated electrical switching between control modules and related circuits. The relay’s 40 amp rating and 12 volt design align with common automotive electrical requirements, while the oval 5-connector layout and 21-terminal interface support the specified factory-style connection pattern. This part number, RY-1739, is listed for 1996-2004 Mercedes-Benz applications including SLK230, SLK32 AMG, SLK320, E320, and E420.

This part cross-references 1R3725 and R7242 for the same application.

Common Issues This Relay Can Address

• Intermittent electrical relay operation
• Loss of module-controlled circuit switching
• Faulty relay response in multi-function electrical systems
• No-start or accessory circuit issues tied to relay failure
• Electrical contact problems at the relay connection point

Installation Notes and Tips

• Verify connector shape, terminal count, and terminal gender before installation.
• Confirm vehicle year and model against the listed fitment for Mercedes-Benz SLK230, SLK32 AMG, SLK320, E320, or E420.
• Inspect the relay socket and surrounding terminals for heat damage, corrosion, or looseness before installing RY-1739.
• Match the original relay configuration to the replacement part to ensure proper circuit function.

Quality Assurance

Standard Ignition supplies automotive electrical components for service replacement applications. RY-1739 is specified for the listed Mercedes-Benz fitments and built to match the required electrical and connector characteristics for those vehicles.