Originally Posted by Rick76

I also found 003 545 44 26 and a 001 545 38 26 but I don't know which would fit your connector. The female looks like 003 545 26 26. I've never bought the 4mm contacts. I usually pick up a supply at the wrecker taking them from inside the cabin or trunk where they are not corroded.
They might clean up OK with a little Brasso or Silvero on a Q tip and then dielectric grease or one of the specialty greases for electrical connectors.
Tighten the female contact after cleaning if not replacing.

I believe that connector is also used for the blower on a 124 (above the brake booster) and from wires coming from the oil level sensor and starter. Also in blower circuit of MY87 and beyond 126's. These connectors are mounted in the dual firewall so should be corrosion free.

Originally Posted by 97 SL320

That is more of a throttle switch than a throttle position sensor since it turns on and off rather than a variable resistance.

The round connector pins are silver plated, this was MB's solution for making reliable connectors before someone decided to make sealed connectors.

These can be cleaned and a bit of grease put on to seal.