Bosch Ignition Coil for Mercedes-Benz — Direct-Fit Single Coil (0221503035) with Corrosion-Resistant Connectors

Bosch 0221503035 is a direct-fit ignition coil engineered to restore reliable spark delivery and engine starting on compatible Mercedes-Benz vehicles.

If your Mercedes shows misfires, rough idle, or hard starting, the ignition coil is often a primary suspect. This Bosch single ignition coil is manufactured to match or exceed original equipment standards, offering corrosion-resistant connectors, robust thermal and vibration tolerance, and consistent voltage output to the spark plug. Designed from Bosch’s long experience in ignition systems, this coil aims to deliver steady performance and extended service life under real-world driving conditions.

How does this coil improve starting and idle behavior?

By ensuring a steady, strong high-voltage pulse to the spark plug, the ignition coil helps the engine ignite air/fuel mixtures more reliably. That reduces hesitation, cut-outs, and uneven idle that occur when coils degrade.

• Restores consistent voltage to spark plugs for cleaner combustion
• Supports stronger cold-start ignition and fewer misfires
• Helps stabilize idle by preventing intermittent spark loss

Will this part fit my Mercedes model and replace the OE number?

This Bosch coil is built as a direct equipment replacement for many Mercedes-Benz models including B, C, CL, CLK, CLS, E, G, ML, R, S, SL, SLK and AMG variants with compatible engines. It corresponds to several OE references, making it suitable where those part numbers are specified.

• Compatible with select 240, 280, 320, 350, 430, 450, 500 engine applications
• Replaces OE numbers such as 0001587803, 05098138AA, A0001587803, and others
• Sold as a single coil so you can replace only the faulty unit

What durability and material benefits does Bosch provide?

Bosch designs ignition coils with materials and processes aimed at resisting corrosion, heat, and vibration—common causes of coil failure. The result is a longer-lasting component that maintains electrical connectivity over time.

• Corrosion-resistant electrical connections to preserve conductivity
• Precision molding and quality materials for thermal stability
• Engineered to tolerate engine-bay vibration and repeated thermal cycles

How straightforward is installation and what should I expect after replacement?

Installation is typically straightforward for technicians or experienced DIYers: remove the faulty coil, swap in the Bosch unit, and reconnect. After replacement you should notice improved starting responsiveness and fewer ignition-related trouble codes if the coil was the root cause.

• Direct-fit design simplifies bolt-on replacement with stock connectors
• No special tuning required—operates with the vehicle’s existing ignition control
• May eliminate engine codes and restore smooth operation when coil-related

Who is this for: Drivers and technicians seeking an OE-quality single ignition coil replacement for compatible Mercedes-Benz vehicles who want reliable spark performance, corrosion-resistant connections, and a product backed by Bosch’s engine-management expertise. Choose this coil when you need a durable, direct-fit unit to address misfires, hard starts, or rough idle without replacing the entire coil pack unnecessarily.