Spark plug NGK – Mercedes M114 M115 M116 M121 M130

Description

Spark plug – affordable alternative – Mercedes M114 M115 M116 M121 M130

This spark plug is a high-quality and affordable replacement for the original Mercedes spark plugs with OEM numbers A0031591303 / 0031591303 and A0031594203 / 0031594203. The spark plug is equivalent to Bosch WR6DC (0 242 240 592) and ensures reliable ignition, smooth engine operation, and optimal combustion.

Suitable for Mercedes models

• Mercedes W114 250 (114.010)
• Mercedes W114 250 C (114.021)
• Mercedes W114 250 CE (114.022)

• Mercedes W460 G-Class 230 G
• Mercedes W460 G-Class Cabriolet 230 G

• Mercedes W109 300 SEL (109.016)
• Mercedes W109 300 SEL 3.5 (109.056)

• Mercedes W121 190 SL (121.040 / 121.042)

Suitable for Mercedes engines

• M114
• M115
• M116
• M121
• M130

OEM references

Mercedes

• A0031591303
• 0031591303
• A0031594203
• 0031594203

Bosch

• WR6DC
• 0 242 240 592

Specifications

1. Part: spark plug.
2. Affordable alternative to the original Mercedes spark plug.
3. Bosch equivalent: WR6DC / 0 242 240 592.
4. Suitable for M114, M115, M116, M121, and M130 engines.
5. Ensures reliable ignition, smooth engine operation, and optimal combustion.
6. Suitable for the Mercedes models mentioned above.

Important

Always check new spark plugs for transport damage before installation. Dented packaging may indicate that the ceramic insulator part has sustained a hairline crack. Damaged ceramic can come loose during use and cause serious engine damage.

Always check the prescribed electrode gap before installation. Even new spark plugs may have a deviating electrode gap during transport or storage. If necessary, carefully adjust the gap according to Mercedes factory specifications.

We recommend replacing spark plugs preventively every 8 years or 30,000 kilometers to replace, depending on which is reached first. Even in vehicles that are driven infrequently, the electrodes and insulation material can deteriorate due to aging, which can lead to a weaker spark, rough engine operation, higher fuel consumption, and reduced cold starting.

For optimal performance, we recommend always replacing spark plugs as a complete engine set. Simultaneously check the condition of the spark plug wires, distributor cap, and distributor rotor to prevent voltage loss and ignition malfunctions.

Always check before purchase and installation whether the part is suitable and equivalent based on photos, description, and specifications; installed or used parts cannot be returned.