Bosch SR0509N Starter

Bosch Starter SR0509N Overview

Bosch SR0509N is a new 12-volt starter built for Mercedes-Benz applications that require a permanent magnet gear reduction design. It is engineered for reliable cranking performance and direct replacement service on select GLA250, CLA250, CLA45 AMG, GLA45 AMG, and B250 models.

The Bosch Starter (New) line focuses on OE-style fit and dependable starting performance. This Bosch starter SR0509N uses a grounded aluminum case, an aluminum open nose, and an attached solenoid for a clean, integrated starting system layout.

Key Features

• 12-volt starter with permanent magnet gear reduction (PMGR) design
• 2.2 power rating for starting performance
• Counterclockwise (left) rotation
• Grounded case construction
• Aluminum housing and aluminum open nose cone
• Solenoid attached for simplified replacement
• Designed for automatic start/stop operation
• 13-tooth drive configuration
• Flange mount design with 2 mounting bolt holes

Detailed Product Description

Bosch SR0509N is a new starter assembly designed for select Mercedes-Benz compact performance and utility models. It is built with a permanent magnet gear reduction layout to deliver efficient engagement, while the 13-tooth drive and counterclockwise rotation match the specified application requirements. The aluminum housing and open nose design support a lightweight, durable construction, and the attached solenoid helps streamline replacement of the starter unit.

Compatible With 2015-2020 Mercedes-Benz GLA250, 2014-2019 Mercedes-Benz CLA250, 2014-2019 Mercedes-Benz CLA45 AMG, 2015-2019 Mercedes-Benz GLA45 AMG, and 2013-2018 Mercedes-Benz B250. This Bosch SR0509N starter is a direct-fit option for drivers searching for a Mercedes-Benz GLA250 starter, CLA250 starter, or CLA45 AMG starter replacement with the correct electrical and mounting specifications.

This part cross-references 2709060700 and 6459060800 for the same application.

What This Starter Helps Address

• Slow or weak engine cranking
• No-start conditions caused by starter failure
• Intermittent starter engagement
• Grinding or improper starter drive engagement
• Replacement needs on vehicles with start/stop operation

Installation Notes and Tips

Verify the mounting flange, bolt-hole count, rotation direction, tooth count, and electrical connection before installation. This starter is flange-mounted and does not include mounting hardware or shims, so reuse or source the correct vehicle-specific hardware as needed. Confirm the vehicle’s original starter specifications match the Bosch SR0509N before installation on Mercedes-Benz CLA250, GLA250, CLA45 AMG, GLA45 AMG, or B250 applications.

Quality Assurance

Bosch Premium Starters are designed, built, and tested for performance and reliability. The SR0509N is a new starter assembly manufactured to meet the demands of modern Mercedes-Benz starting systems, including automatic start/stop operation.