Standard Ignition TX209 Engine Coolant Temperature Sensor

Engine Coolant Temperature Sensor for Mercedes-Benz

Standard Ignition TX209 is an engine coolant temperature sensor built for direct-fit service on select Mercedes-Benz models. It uses a bolt-on attachment method, a square female plug-in connector, and a 4-blade male terminal layout to match the original electrical connection on covered applications.

Compatible With Mercedes-Benz SL600, CL600, S420, S500, S600, E300, E420, SL500, C220, C280, C36 AMG, S320, and SL320 applications across the listed model years. This Standard Ignition TX209 coolant temperature sensor is a practical OE-style replacement for diagnosing and restoring accurate engine temperature signal input.

Key Features

• Engine coolant temperature sensor for select Mercedes-Benz vehicles
• Bolt-on attachment method for straightforward mounting
• Square, female plug-in connector with 1 connector and 1 port
• 4-blade male terminal design for the specified applications
• Metal and plastic construction for underhood service
• Cross-references Genuine 0115425117 for the same application

Detailed Description

Standard Ignition TX209 is designed for vehicles that rely on a coolant temperature signal for engine management and gauge operation. The sensor’s connector shape, terminal style, and bolt-on design are specified to align with the original equipment configuration on covered Mercedes-Benz models, including 1996-2002 Mercedes-Benz SL600, 1998-1999 Mercedes-Benz CL600, 1996-1999 Mercedes-Benz S420, 1996-1999 Mercedes-Benz S500, 1996-1999 Mercedes-Benz S600, 1996-1997 Mercedes-Benz E300, 1997 Mercedes-Benz E420, 1996-1997 Mercedes-Benz SL500, 1996 Mercedes-Benz C220, 1996 Mercedes-Benz C280, 1996 Mercedes-Benz C36 AMG, 1996 Mercedes-Benz S320, and 1996 Mercedes-Benz SL320. The TX209 part number is also a useful reference when searching for a Mercedes-Benz engine coolant temperature sensor replacement.

Common Issues This Sensor May Address

• Incorrect coolant temperature readings on the dash or scan tool
• Hard starting or rough running related to inaccurate temperature input
• Cooling fan control concerns tied to faulty temperature data
• Check engine light conditions associated with coolant temperature sensor faults
• Driveability problems caused by inconsistent engine temperature reporting

Installation Notes and Tips

Verify connector style, terminal count, and mounting style before installation. Match the vehicle application carefully, especially on Mercedes-Benz S420 models noted with 4 blade terminals. Inspect the connector for corrosion, damaged terminals, or heat-related wear before connecting the new sensor. Confirm the cooling system is at a safe temperature before service.

Quality Assurance

Standard Ignition supplies replacement electrical and engine management components for service applications that require OE-style fit and connection details. TX209 is built to match the listed connector and mounting specifications for the covered Mercedes-Benz applications.