Fel-Pro 35908 Engine Coolant Thermostat Seal

Fel-Pro 35908 Thermostat Seal Overview

Fel-Pro 35908 is a premium engine coolant thermostat seal built for Mercedes-Benz and Chrysler applications that need a precise sealing surface. It uses application-specific materials to help maintain 100% vehicle sealing performance in the cooling system.

Compatible with a wide range of Mercedes-Benz models, including E320, S500, ML320, and SL500, this thermostat seal supports reliable coolant control at the thermostat housing. Fel-Pro 35908 is also cross-referenced to MAHLE C31887 for the same application.

Key Features

• Premium-grade engine coolant thermostat seal
• Application-specific sealing materials for a precise fit
• Supports dependable sealing in the cooling system
• Fits Mercedes-Benz and Chrysler applications across multiple model years
• Part number 35908 for easy identification

Detailed Description

Fel-Pro 35908 is engineered as a thermostat seal for vehicles that require a reliable coolant-side seal at the thermostat assembly. Fel-Pro’s sealing approach focuses on vehicle-specific material selection, helping the seal conform properly to the mating surfaces used in Mercedes-Benz and Chrysler cooling systems. This makes it a practical choice for service work on models such as the Mercedes-Benz E320, S430, and ML350, as well as the Chrysler Crossfire.

Fits 1998-2005 Mercedes-Benz CLK320, N/A. Fits 1998-2005 Mercedes-Benz E320, N/A. Fits 1998-2003 Mercedes-Benz ML320, N/A. Fits 1999-2006 Mercedes-Benz SL500, N/A. Fits 2004-2008 Chrysler Crossfire, N/A. Part number 35908 is also listed under interchange references 5099341AA and 1122030076.

What This Part Helps Address

• Coolant seepage at the thermostat housing
• Loss of sealing integrity after thermostat service
• Leaks caused by worn or flattened original seals
• Cooling system maintenance on Mercedes-Benz and Chrysler vehicles
• Repeat repairs from poor gasket-to-housing sealing

Installation Notes and Tips

Inspect the thermostat housing and mating surfaces before installation. Remove old seal material, clean the sealing area thoroughly, and verify the replacement seal seats evenly before reassembly. Use the correct coolant service procedure for the vehicle and confirm there are no leaks after the system reaches operating temperature.

Quality Assurance

Fel-Pro positions this seal as a premium sealing solution with materials selected for application-specific fit and durability. The brand’s sealing systems are widely used in professional engine service, and part number 35908 is supported by established cross-reference data for identification.