Quick view VDO Kitas2+ Smart Tachograph speed sensor - M18x1.5 - 25mm - 1.2mm VDO 2171-20002315 Smart tachograph sensor: Kitas2+ Tachograph: DTCO 1381 - MTCO 1324 Application: Mercedes-Benz Thread: M18x1.5 - Washer 1.2mm Speed sensor element length: 25mm ISO15170 Connector: 4-Pole Natural