Standard Ignition SIA4 Shift Interlock Actuator

Shift Interlock Actuator for Mercedes-Benz

The Standard Ignition SIA4 shift interlock actuator is a direct-fit transmission switch component for vehicles equipped with the specified 11mm width offset hinge setup. It is used in Mercedes-Benz CL-Class and S-Class applications where the shift interlock system must release and lock the selector as intended.

Key Features

• Standard Ignition SIA4 shift interlock actuator
• Transmission switch component for shift interlock operation
• Includes 1 actuator
• Designed for Mercedes-Benz CL500, CL55 AMG, CL600, CL65 AMG, S350, S430, S500, S55 AMG, S600, and S65 AMG applications with the listed hinge configuration
• Cross-references Standard Ignition SIA4 and interchange part numbers 2202679924, ILA4, and SLA702

Detailed Description

Standard Ignition SIA4 is a shift interlock actuator used in Mercedes-Benz vehicles with the 11mm width offset hinge suitable for shift interlock actuator applications. It is listed for 2000-2006 Mercedes-Benz CL500, 2001-2006 CL55 AMG, 2001-2006 CL600, 2005-2006 CL65 AMG, 2006 S350, 2000-2006 S430, 2000-2006 S500, 2001-2006 S55 AMG, 2001-2006 S600, and 2006 S65 AMG. If you are replacing a Mercedes-Benz CL500 shift interlock actuator or sourcing an S-Class shift interlock actuator by part number SIA4, this component matches the documented application data.

Common Issues This Part Addresses

• Shift lever will not release from park
• Interlock system does not engage or disengage correctly
• Transmission selector movement is inconsistent
• Faulty actuator operation in the shift lock mechanism
• Replacement need for a worn or failed shift interlock actuator

Installation Notes and Tips

Verify the vehicle’s hinge width and offset configuration before installation. Confirm the part number SIA4 against the existing component and compare the vehicle application to the listed Mercedes-Benz CL-Class and S-Class fitment. Proper diagnosis of the shift interlock system, related switches, and selector components helps ensure the replacement addresses the root cause.

Quality Assurance

Standard Ignition is a recognized aftermarket brand for electrical and transmission control components. This part cross-references 2202679924 and ILA4 for the same application.