Spark plug Mercedes M116 M117 M110 engine – alternative for the W7DC WR7D WR7DC

Description

NGK BP6ES spark plug as an affordable alternative to Bosch W7D W7DC WR7DC0 and WR7DC+ – Mercedes

The NGK BP6ES is a high-quality spark plug and an affordable alternative to the Bosch W7D, W7DC, WR7DC0, and WR7DC+ spark plugs used in various classic Mercedes petrol engines.

This spark plug is suitable for various versions of the Mercedes M100, M110, M114, M115, M116, M117, M130, and M180 engines, among others. Multiple versions, compression ratios, and ignition systems were used within these engine series. Therefore, always check which spark plug type is prescribed for the specific engine before purchasing.

The original Bosch spark plugs from the former German production are becoming increasingly difficult to obtain. Good old stock is becoming scarcer, causing prices to rise. The NGK BP6ES is therefore a readily available and reliable alternative with a favorable price-performance ratio.

We regularly use NGK spark plugs in various classic Mercedes engines. The BP6ES is known for reliable ignition, stable engine operation, and consistent product quality.

Suitable for Mercedes models

• Mercedes C107 280 SLC (107.022)
• Mercedes C107 350 SLC (107.023)
• Mercedes C107 450 SLC (107,024) (EU version, not NV)

• Mercedes R107 280 SL (107.042)
• Mercedes R107 350 SL (107.043)
• Mercedes R107 450 SL (107.044) (EU version, not NV)
• Mercedes R107 420 SL (107.047)

• Mercedes W108/W109 300 SEL (109.016)
• Mercedes W109 300 SEL 3.5 (109.056)
• Mercedes W109 300 SEL 6.3 (109.018)

• Mercedes W114 230.6 (114.015)
• Mercedes W114 250 2.8 (114.011)
• Mercedes C114 250 C 2.8 (114.023)
• Mercedes C114 280 C (114.073)
• Mercedes C114 280 CE (114.072)

• Mercedes W116 280 S (116.020)
• Mercedes W116 280 SE (116.024)
• Mercedes W116 280 SEL (116.025)
• Mercedes W116 350 SE (116.028)
• Mercedes W116 350 SEL (116.029)
• Mercedes W116 450 SE (116.032) (EU version, not NV)
• Mercedes W116 450 SEL (EU version, not NV)

• Mercedes W126 420 SE (126.034)
• Mercedes W126 420 SEL (126.035)
• Mercedes W126 560 SE (126.038)
• Mercedes W126 560 SEL (126,039) (EU version, not NV)

• Mercedes C126 380 SEC (126.043)
• Mercedes C126 560 SEC (126,045) (EU version, not NV)

• Various other classic Mercedes models with the engines listed below.

Suitable for Mercedes engines

• M100
• M110
• M114
• M115
• M116
• M117
• M130
• M180

Suitable for the following engine codes, among others

• M100.981
• M110.921
• M110.922
• M110.932
• M110.981
• M110.982
• M110.983
• M110.985
• M110.986
• M110.990
• M110.993
• M116.963
• M116.964
• M116.965
• M116.981
• M116.982
• M116.983
• M116.984
• M117968
• M117982
• M117983
• M117985
• M117986
• M130.923
• M130.981
• M180.954

Specifications

1. Brand: NGK.
2. Type: BP6ES.
3. Thread size: M14 x 1.25.
4. Thread length: 19 mm.
5. Wrench size: 20.8 mm.
6. Seal: flat sealing ring.
7. Center electrode: nickel.
8. Number of ground electrodes: 1.
9. SAE connection: screw-off.
10. Interference suppression: not suppressed.
11. Affordable alternative to Bosch W7D, W7DC, WR7DC0 and WR7DC+.
12. Good availability and favorable value for money.

OEM references

• A0031591203 / 0031591203
• A0031592603 / 0031592603
• A0031594503 / 0031594503

Important

Before installation, always check that the prescribed heat number and spark plug type correspond to the specifications of the engine in question. Various compression ratios, ignition systems, and versions have been used within the mentioned Mercedes engine series. Consequently, the prescribed spark plug type may differ by year of manufacture, engine code, and version.

Tip

Always check the electrode gap of each spark plug before installation.

• For many later Mercedes engines, an electrode gap of 0.8 mm is prescribed.
• For various older versions, an electrode gap of 0.7 mm may be prescribed.

Although new spark plugs are usually supplied ready for installation, the electrode gap may deviate due to transport or improper handling. Therefore, check each spark plug with a feeler gauge before installation and carefully adjust the gap if necessary.

Additionally, carefully inspect new spark plugs for transport or drop damage. A dent or damage to the packaging may indicate that the spark plug has been hit hard. As a result, the ceramic insulation part may contain invisible hairline cracks.

Damaged ceramic can come loose during use and end up in the combustion chamber, potentially resulting in serious engine damage. Therefore, only install spark plugs with completely undamaged ceramic.

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.