🚨 1990 Mercedes-Benz 300SL: Emergency Neutral
The 1990 300SL (R129 generation roadster) uses a floor-mounted center console shift lever with electronic shift interlock.
✓ Expert-verified by Chris Hackleman & Jeff Moore — master technicians, 20+ years each.
⚠️ Chock the wheels first — neutral means the car can roll. Set the parking brake while you work, never stand downhill of the vehicle, and try a 12-volt jump before any override: power fixes most stuck-in-park problems instantly.
The procedure
- Ensure the vehicle is on level ground with parking brake firmly applied and wheels chocked.
- Turn the ignition key to position II (on) if battery has any charge remaining.
- Press the brake pedal firmly and attempt to shift to Neutral normally.
- If the shifter remains locked, locate the shift lock override slot on the console near the shifter base.
- Look for a small rectangular or circular cover on the left side or front of the shifter base—pry it off gently with a trim tool or flathead screwdriver.
- Insert a small flathead screwdriver or key into the exposed override slot and press down firmly.
- While holding the override depressed, press the release button on the shifter and move it to Neutral.
- Verify the transmission is in Neutral before attempting to move the vehicle.
Shift-lock override location
Small covered slot on the console near the shifter base, typically on the left side or front face of the shifter surround; requires removing a plastic cover cap
With zero electrical power
With zero electrical power, the mechanical override should still function to release the shift lock. However, the R129 may have steering lock issues without power—turn the key to position I while applying slight steering wheel pressure to unlock. If the steering cannot be unlocked, the vehicle must be flatbedded. Jump-starting is the most reliable solution for completely dead batteries.