🚨 1990 Mercedes-Benz 500SL R129: Emergency Neutral
The 1990 500SL (R129 chassis, first year) uses a floor-mounted console shifter with electronic shift lock controlled by the brake pedal and ignition position.
🧰 Drafted with AI under the editorial review of Chris Hackleman & Jeff Moore — cross-check against your owner’s manual when possible.
⚠️ 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 a flat surface and parking brake is fully engaged
- Turn the ignition key to position I or II (ACC or ON) if battery has any charge remaining
- Locate the small rectangular shift lock override slot on the left side of the shifter base, near the bottom of the shifter surround
- Remove the small plastic cap covering the override slot (it may pop out or slide off depending on trim)
- Insert a small flathead screwdriver or the emergency key blade fully into the override slot
- While pressing the screwdriver down firmly to depress the override mechanism, press the brake pedal (if power available) and move the shifter to Neutral
- If no power available, maintain downward pressure on the override and apply significant force to move the shifter - the mechanical lock should release
- Keep the screwdriver inserted or have someone hold the shifter in Neutral until the vehicle is secured
Shift-lock override location
Left side of the shifter base console, small rectangular slot covered by a plastic cap, approximately 1 inch from the shifter lever base
With zero electrical power
With zero electrical power, the shift lock override still functions mechanically. You will need to apply more force to overcome the detent springs without electronic assist. The override slot remains accessible and functional. If the steering lock is engaged, you may need to rock the steering wheel while turning the key to unlock it before accessing the shifter area.