Mercedes-Benz 5-Pin Speed & Clutch Transmission Wire Harness Connector – Female OEM

Mercedes-Benz 7G-Tronic (7-speed automatic) and 9G-Tronic (9-speed automatic) transmissions are among the most sophisticated automatic gearboxes in production, with electro-hydraulic control systems that demand precise sensor and actuator signal integrity. This 5-pin female connector serves the speed sensor and clutch pack harness in Mercedes-Benz automatic transmissions, integrating input shaft speed, output shaft speed, clutch pack temperature, and actuator control circuits. Available bare or with 15cm pre-wired leads.

Key Specifications

7G-Tronic & 9G-Tronic – Why Connector Integrity Is Critical

The Mercedes-Benz 7G-Tronic and 9G-Tronic transmissions use a fully electronic shift control system with no mechanical shift linkage. Every gear change is commanded by the TCM based on speed sensor inputs and clutch pack pressure feedback. The 5-pin speed/clutch connector carries the speed sensor signals that the TCM uses to calculate gear ratios and detect slip. When this connector corrodes, the TCM receives incorrect speed data and begins making erratic shift decisions – causing harsh upshifts, missed gears, or the transmission entering limp mode (P-mode). On Mercedes XENTRY, this typically generates P0715 (input speed sensor), P0720 (output speed sensor), and P0730 (incorrect gear ratio) simultaneously. The relatively high price of this connector reflects the precision manufacturing required for Mercedes-Benz transmission harness applications.

Variant Guide

• Female – Bare 5-pin housing with terminals
• Female 15CM – Pre-wired with 15cm leads for direct splice-in installation

Installation Steps

1. Drain ATF and remove the transmission oil pan to access the speed/clutch harness
2. Locate the 5-pin connector on the speed sensor or clutch pack harness
3. Use a terminal extraction tool to remove terminals from the original housing
4. Transfer terminals to the new housing maintaining exact pin positions
5. Reinstall the oil pan with a new gasket and refill ATF to Mercedes-Benz specification (MB 236.14 or 236.15)
6. Use Mercedes XENTRY to clear fault codes and perform a transmission adaptation reset

Frequently Asked Questions

Q: What Mercedes-Benz models use this 5-pin transmission connector?
A: This connector is used on Mercedes-Benz C-Class (W204/W205), E-Class (W212/W213), S-Class (W221/W222), GLC, GLE, and GLS with 7G-Tronic (722.9) and 9G-Tronic (725.0) transmissions. Cross-reference your vehicle’s wiring diagram to confirm fitment.

Q: What ATF specification is required for the 7G-Tronic and 9G-Tronic?
A: Mercedes-Benz 7G-Tronic requires MB 236.14 ATF; 9G-Tronic requires MB 236.15 ATF. Using incorrect ATF will damage the transmission clutch packs.

Q: What fault codes indicate a failed speed/clutch connector?
A: Common codes include P0715 (input shaft speed sensor), P0720 (output shaft speed sensor), P0730 (incorrect gear ratio), P0740 (torque converter clutch), and transmission limp mode on Mercedes XENTRY.

Q: Are terminals included?
A: Yes, terminals are included with all variants.

Compatible Applications

• Mercedes-Benz C-Class W204/W205 – 7G-Tronic speed sensor harness
• Mercedes-Benz E-Class W212/W213 – 9G-Tronic clutch pack connector
• Mercedes-Benz S-Class W221/W222 / GLC / GLE / GLS – Transmission speed harness