Hella 358000821 Ignition Coil

Hella Ignition Coil for Mercedes-Benz C250 and SLK250

The Hella 358000821 ignition coil is a flush-fitting pencil ignition coil built for direct replacement service on select Mercedes-Benz applications. It uses a bolted mounting design with 2 mounting bores, 3 poles, and 12-volt rated operation for a precise OE-style fit.

Compatible with 2012-2015 Mercedes-Benz C250 and 2012-2015 Mercedes-Benz SLK250, this ignition coil supports consistent spark delivery in engines that use pencil-style coil packaging. The Hella brand line focuses on application-specific ignition components, and this part number is listed for the same vehicle coverage across the model years shown.

Key Features

• Flush-fitting pencil ignition coil design
• Bolted mounting type with 2 mounting bores
• 3-pole electrical connection
• 12V rated voltage
• Direct-fit replacement for select Mercedes-Benz ignition systems
• Hella part number 358000821

Detailed Description

Hella 358000821 is an ignition coil engineered for Mercedes-Benz C250 and Mercedes-Benz SLK250 models from 2012 through 2015. Its flush-fitting pencil coil format and bolted attachment layout match the vehicle-specific mounting style used in these applications, helping maintain proper coil positioning at the spark plug well. This part cross-references Delphi GN10552 for the same application.

Use Hella 358000821 when replacing a worn or failed coil on a Mercedes-Benz C250 or SLK250 that calls for a 3-pole, 12-volt pencil ignition coil. The part number 358000821 is also commonly searched as a direct replacement reference for these model years.

What It Helps Address

• Engine misfire caused by a weak or failed ignition coil
• Rough idle related to inconsistent spark output
• Hard starting from poor coil performance
• Loss of acceleration response under load
• Check engine light conditions tied to ignition coil faults

Installation Notes and Tips

Verify the connector style, 3-pole configuration, and bolted mounting layout before installation. Confirm the vehicle uses a flush-fitting pencil ignition coil and match the replacement to the original coil position and engine application. Inspect the spark plug and coil boot area for wear, oil intrusion, or carbon tracking before installing the new coil.

Fits 2012-2015 Mercedes-Benz C250, N/A. Fits 2012-2015 Mercedes-Benz SLK250, N/A.

Quality Assurance

Hella is an established automotive parts brand with application-specific ignition components. This ignition coil is identified by part number 358000821 and is cataloged for the Mercedes-Benz fitments listed above.