Bosch FR6MPP332 Spark Plug

Bosch OE Fine Wire Double Platinum Spark Plug

Bosch FR6MPP332 is an OE Fine Wire Double Platinum spark plug built for stable ignition performance and extended service life. It uses platinum on the center electrode and platinum in the ground electrode inlay to reduce gap erosion and maintain consistent firing characteristics.

Compatible With Mercedes-Benz applications including G55 AMG, SLR McLaren, SL55 AMG, CL55 AMG, CLS55 AMG, E55 AMG, S55 AMG, and C230 models listed below. The preset gap and OE-style construction make this Bosch spark plug a direct replacement for vehicles that call for a double platinum design.

Key Features

• OE Fine Wire Double Platinum design for OE-style ignition performance
• Platinum center electrode tip and platinum ground electrode inlay
• Helps reduce gap erosion for longer service life
• Resistor spark plug with 6000 resistance
• Flat seat, standard ground configuration, and standard ground tip design
• Preset .8 gap; do not gap before installation
• 14 mm thread diameter, 16 mm hex size, 26.5 mm reach
• Ceramic insulator with non-projected tip style

Detailed Description

Bosch FR6MPP332 is part of the OE Fine Wire Double Platinum line, a Bosch spark plug family focused on OE-spec ignition performance and durability. The double platinum construction places platinum at both the center and ground electrode contact points, which helps maintain a consistent spark and supports longer plug life in demanding engine conditions. This part number is used in Mercedes-Benz performance and luxury applications that require a preset-gap double platinum plug, including 2005-2011 Mercedes-Benz G55 AMG, 2005-2009 Mercedes-Benz SLR McLaren, 2003-2008 Mercedes-Benz SL55 AMG, 2003-2006 Mercedes-Benz CL55 AMG, 2006 Mercedes-Benz CLS55 AMG, 2003-2006 Mercedes-Benz E55 AMG, 2003-2006 Mercedes-Benz S55 AMG, and 2003-2005 Mercedes-Benz C230.

This Bosch FR6MPP332 spark plug is built with a copper ground electrode core, nickel-yttrium and copper center electrode core material, and a ceramic insulator. The manufacturer heat range is 6, and the plug is configured as a 4-cycle resistor type for secondary ignition service.

What It Helps Address

• Misfires caused by worn or eroded spark plug electrodes
• Hard starting from weak or inconsistent ignition output
• Rough idle related to degraded spark delivery
• Loss of throttle response from aging plugs
• Service intervals shortened by rapid gap wear

Installation Notes and Tips

Install FR6MPP332 only in applications listed in the fitment data. The gap is preset, so do not adjust it before installation. Verify the engine calls for a flat-seat, 14 mm thread, 26.5 mm reach spark plug with a 16 mm hex and resistor design. For Mercedes-Benz G55 AMG, SLR McLaren, SL55 AMG, CL55 AMG, CLS55 AMG, E55 AMG, S55 AMG, and C230 applications, follow the vehicle service procedure and torque specification from the manufacturer.

• Do not gap the plug before use
• Confirm the original plug specification matches the listed heat range and reach
• Inspect ignition coils and boots during spark plug service
• Use the vehicle’s service manual for final torque values

Quality Assurance

Bosch engineers this spark plug to meet Original Equipment specifications for double platinum applications. The platinum-on-platinum electrode design is used to improve durability and maintain performance over time in OE-style ignition systems.