Genuine German-manufactured Mercedes-Benz Automatic Transmission Neutral Safety & Back-Up Light Switch for classic W124, W126, W140, and R129 models. Mounted directly on the side of the automatic transmission gear selector shaft, this multi-function switch prevents the engine from cranking unless the shifter is in Park or Neutral and activates the reverse lights when shifted into Reverse.

Condition: Working. Pulled from a functional vehicle or verified via continuity bench-testing. Features clean, straight electrical connector pins, an intact white sliding locking collar, uncracked black composite housing, and solid metal mounting eyelets with normal age-related surface wear.

🚗 Vehicle Compatibility:

• 1992–1995 Mercedes-Benz 300SE / 400SE / 400SEL / 500SEL / 600SEL (W140 Chassis)

• 1994–1995 Mercedes-Benz S320 / S350 / S420 / S500 / S600 (W140 / C140 Chassis)

• 1990–1995 Mercedes-Benz 300SL / 500SL / 600SL / SL320 / SL500 / SL600 (R129 Chassis)

• 1992–1995 Mercedes-Benz 400E / 500E / E320 / E420 / E500 (W124 Chassis)

• 1990–1991 Mercedes-Benz 300SE / 300SEL / 350SD / 350SDL / 420SEL / 560SEL / 560SEC (W126 / C126 Chassis - 722.3 / 722.5 4-Speed & 5-Speed Automatic Transmissions)

(Note: Direct factory replacement for earlier Mercedes-Benz 000 545 49 06 switches on late-production W126 and early W124/W140/R129 automatic transmissions. Always verify the stamped part number and 6-pin round connector configuration prior to purchase.)

⚠️ Common Problems:

• Intermittent or complete no-crank condition in Park or Neutral caused by worn internal copper wiper contacts

• Reverse / back-up lights failing to illuminate when the gear selector is placed in Reverse

• Transmission limp-home mode or erratic shift points on electronically controlled 722.5 5-speed automatic models

• Brittle, heat-cycled plastic connector housing or broken locking slide preventing a secure wiring harness connection

🔧 The Part Fix:

• Restores reliable starter circuit continuity in Park and Neutral while ensuring consistent reverse lamp activation and accurate gear-position signaling to the transmission control module.

• Prep-Work Warning: When installing, align the switch index marks with the transmission selector lever in the Neutral position before tightening the mounting bolts. Verify that the plastic shift rod bushings are intact, as worn bushings can throw off switch alignment and mimic a faulty switch.

🔢 Part & Manufacturer Identification:

• Primary Mercedes-Benz OE Part Number: 000 545 62 06 (A0005456206)

• Superseded / Interchange Mercedes Numbers: 000 545 49 06 (A0005454906)

• Aftermarket / OEM Cross-Reference Numbers: 80433007001, V30-73-0122

• Housing Stamps & Markings: Mercedes-Benz Three-Pointed Star logo, "000 545 62 06", "09 8543 60", "25761", 6-pin round connector