Pronto PO5277EX Engine Oil Filter

Pronto Extended Life Oil Filter PO5277EX

The Pronto PO5277EX is an extended life engine oil filter built with synthetic filter media for Mercedes-Benz applications that call for cartridge-style filtration. It is sized for a 4.45 in height and uses an NBR gasket to support a secure seal in the oil filter housing.

Key Features

• Synthetic filter media for enhanced oil filtration efficiency
• Cartridge-style engine oil filter design
• Height: 4.45 in
• NBR gasket with 0.14 in thickness
• Gasket inside diameter: 2.85 in; outside diameter: 3.13 in
• Outer diameter bottom: 2.55 in; inner diameter bottom: 1.10 in
• Extended Life product line for longer service intervals in supported applications

Detailed Description

Pronto Extended Life PO5277EX is an engine oil filter for a wide range of Mercedes-Benz models, including E500, G500, GLK350, C300, S550, and SL500 applications. The synthetic media is used to improve oil filtration efficiency, helping capture contaminants as oil circulates through the engine. This cartridge filter is a direct-fit service part for vehicles that use the specified housing and seal dimensions, including many Mercedes-Benz V6 and V8 applications from 1998 through 2017.

The Extended Life line is positioned for drivers who follow longer maintenance intervals and want a cartridge oil filter matched to the factory-style housing design. This part number, PO5277EX, also cross-references Premium Guard PG5277EX for the same application.

What It Is Used For

• Replacing a clogged or worn engine oil filter
• Restoring proper oil flow through the filter housing
• Addressing oil contamination from normal engine wear
• Supporting routine maintenance on Mercedes-Benz oil filter service intervals
• Maintaining filtration performance in extended service schedules

Installation Notes and Tips

Verify the cartridge filter dimensions, gasket size, and housing style before installation. This PO5277EX application is listed for Mercedes-Benz models such as 2006-2011 Mercedes-Benz E350, 2007-2012 Mercedes-Benz GL450, 2005-2011 Mercedes-Benz SLK350, and 2008-2012 Mercedes-Benz GL550. Some fitments note w/o attached stem or enhanced media versions, so confirm the exact engine and housing configuration before service. Always replace the engine oil and inspect the filter housing sealing surfaces during installation.

Quality Assurance

Pronto Extended Life filters are built around synthetic media and OE-style cartridge construction for supported Mercedes-Benz applications. The PO5277EX is listed across 401 vehicle fitments, covering model years 1998 through 2017, including Mercedes-Benz E500, G550, and C300 applications.