Bosch 96346 Spark Plug

Bosch OE Fine Wire Double Iridium Spark Plug

Bosch 96346 is an OE Fine Wire Double Iridium spark plug built for Mercedes-Benz engines that demand precise ignition and long service life. The fine-wire center electrode, tapered ground electrode, and iridium-based firing surfaces support consistent spark delivery in high-output applications.

Compatible With Mercedes-Benz GLE63 AMG, GLS550, SL550, CLS550, G63 AMG, E550, S550, and related models listed below, Bosch 96346 is engineered for direct OE-style replacement service. The Bosch OE Fine Wire Double Iridium line focuses on ignition performance and durability in one plug design.

Key Features

• Fine wire center electrode for focused spark initiation
• Double iridium construction for long wear resistance
• Tapered ground electrode design for efficient ignitability
• J-gap ground configuration with a projected insulator
• Resistor-type plug with 1000 ohm resistance
• Ceramic insulator and copper core materials for stable operation
• Flat seat, 12 mm thread diameter, 14 mm hex size, and 26.5 mm reach

Detailed Description

Bosch 96346 uses an ultra-fine wire center electrode and a laser-welded ground electrode design to promote reliable spark formation under demanding combustion conditions. The iridium-alloy center firing pin and iridium-platinum ground tip help maintain electrode integrity over extended service intervals, while the resistor design supports stable ignition system performance. This spark plug is a direct-fit service part for a wide range of Mercedes-Benz applications, including Mercedes-Benz E350, Mercedes-Benz ML350, and Mercedes-Benz SLK350, as well as performance models such as Mercedes-Benz S63 AMG and Mercedes-Benz CLS63 AMG S.

This part cross-references Bosch 96346 for the same application.

What It Helps Address

• Misfires caused by worn spark plug electrodes
• Hard starting from weak or inconsistent spark output
• Rough idle related to degraded ignition performance
• Loss of throttle response from inefficient combustion
• Service intervals affected by plug wear in high-heat engines

Installation Notes and Tips

Verify the thread diameter, reach, seat type, and pre-gap before installation. Bosch 96346 uses a 12 mm thread, 26.5 mm reach, flat seat, and .7 pre-gap specification. Inspect ignition coils and plug wells during service, and follow the vehicle manufacturer’s torque specification for the engine being serviced.

Quality Assurance

Bosch OE Fine Wire Double Iridium plugs are built around laser-welded electrode construction and iridium-based tip materials to support consistent ignition performance and extended service life in OE-style applications.

Compatible Vehicles

• Fits 2016-2019 Mercedes-Benz GLE63 AMG, N/A
• Fits 2016-2019 Mercedes-Benz GLE63 AMG S, N/A
• Fits 2017-2019 Mercedes-Benz GLS550, N/A
• Fits 2017-2019 Mercedes-Benz GLS63 AMG, N/A
• Fits 2013-2019 Mercedes-Benz SL550, N/A
• Fits 2013-2019 Mercedes-Benz SL63 AMG, N/A
• Fits 2012-2018 Mercedes-Benz CLS550, N/A
• Fits 2014-2018 Mercedes-Benz CLS63 AMG S, N/A
• Fits 2013-2018 Mercedes-Benz G63 AMG, N/A
• Fits 2016-2018 Mercedes-Benz GLE350, N/A
• Fits 2016-2018 Mercedes-Benz GLE550, N/A
• Fits 2012-2017 Mercedes-Benz E550, N/A
• Fits 2017 Mercedes-Benz Maybach S550, N/A
• Fits 2012-2017 Mercedes-Benz S550, N/A
• Fits 2011-2017 Mercedes-Benz S63 AMG, N/A
• Fits 2012-2016 Mercedes-Benz E350, N/A
• Fits 2014-2016 Mercedes-Benz E63 AMG S, N/A
• Fits 2013-2016 Mercedes-Benz GL450, N/A
• Fits 2013-2016 Mercedes-Benz GL550, N/A
• Fits 2013-2016 Mercedes-Benz GL63 AMG, N/A
• Fits 2012-2016 Mercedes-Benz SLK350, N/A
• Fits 2012-2016 Mercedes-Benz SLK55 AMG, N/A
• Fits 2012-2015 Mercedes-Benz C350, N/A
• Fits 2013-2015 Mercedes-Benz E400, N/A
• Fits 2012-2015 Mercedes-Benz E63 AMG, N/A
• Fits 2013-2015 Mercedes-Benz GLK350, N/A
• Fits 2012-2015 Mercedes-Benz ML350, N/A
• Fits 2012-2015 Mercedes-Benz ML63 AMG, N/A
• Fits 2013-2014 Mercedes-Benz C300, N/A
• Fits 2011-2014 Mercedes-Benz CL550, N/A
• Fits 2011-2014 Mercedes-Benz CL63 AMG, N/A
• Fits 2012-2014 Mercedes-Benz CLS63 AMG, N/A
• Fits 2012-2014 Mercedes-Benz E300, N/A
• Fits 2012-2014 Mercedes-Benz ML550, N/A
• Fits 2012-2013 Mercedes-Benz R350, N/A