Spark plug – Mercedes M102 M103 engine -NOS Bosch H7DC0 or H7dc+

Description

Original Mercedes NOS H7DC0 or H7dc+ spark plug – highest quality – Mercedes M102 M103 M108

This original Mercedes NOS (New Old Stock) spark plug is an unused original Mercedes part from old factory stock with OEM number A0031590603 / 0031590603. The spark plug was produced according to the original Mercedes specifications and quality standards from the period when these engines were still in production.

Thanks to the original material selection, precise manufacturing, and optimal thermal rating, this Mercedes NOS spark plug offers reliable ignition, smooth engine operation, and optimal combustion. For enthusiasts who wish to maintain or restore their Mercedes as close to the original as possible, this original Mercedes NOS spark plug represents the highest quality available.

Suitable for Mercedes models

• Mercedes C123 230 CE

• Mercedes W123 200, 230 E
• Mercedes S123 200 T, 200 TE, 230 TE
• Mercedes C123 230 CE

• Mercedes W124 200, 200 E, 230 E
• Mercedes C124 230 CE
• Mercedes S124 200 T, 200 TE, 230 TE

• Mercedes W201 190, 190 E 1.8, 190 E 2.0, 190 E 2.3, 190 E 2.5-16, 190 E 2.5-16 Evolution and Evolution II

• Mercedes W126 260 SE, 300 SE, 300 SEL

• Mercedes W460 G-Class 230 GE
• Mercedes W463 G-Class 200 GE, 230 GE

• Mercedes T1 210 2.3

• Mercedes T2/LN1 510 2.3

Suitable for Mercedes engines

• M102
• M103

Specifications

1. Part: original Mercedes NOS spark plug.
2. OEM number: A0031590603 / 0031590603 Bosch H7DC0 or H7dc+
3. Original Mercedes part from old factory stock (New Old Stock).
4. Produced according to the original Mercedes specifications.
5. Highest available quality.
6. Ensures reliable ignition, smooth engine operation, and optimal combustion.
7. Ideal for maintenance, overhaul, and original restorations.
8. 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 original Mercedes NOS spark plugs may have a deviating electrode gap due to prolonged storage. If necessary, carefully adjust the gap according to Mercedes factory specifications.

For optimal results, 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.