Sounds like your neutral safety switch. When you depress your brake, a cylinder in the shifter mechanism releases and allows the gear change. I would bring it to a mechanic, and get it inspected.
Mercury (Hg) is not soluble in water.
The mercury rises. The lower atmospheric pressure allows the mercury to drop in level.
A barometer is a closed-system vacuum that allows the mercury to expand with changes in temperature and pressure.
This is a shifter to a manual transmission. It is shorter than the normal shifter, and it allows for better maneuvering and shifting ability. It also improves the cars performance because it eliminates the extra time betweeen shifing.
Check the switch on the brake pedal that allows the transmission shifter to move into gear. If this switch/cable is broken the shifter doesn't know the brake is pressed so it will not allow shifter to move. It is a safety feature... a good one too.
replace the shifter cables and shifter shaft itself the lock could be broke or one of the cables
There are pills which can neutralize mercury. This is called Selenium. It is found naturally in nuts and fish. It is also available as a dietary supplement. It mixes with the mercury and allows it to flush out of your system.
It came in both traditional manual transmission and sequential "SportShift", which is automatic transmission that has a shifter that allows for upshifts and downshifts.
When pressed, it allows the shifter to be moved from park to any other gear without turning the key and depressing the brake. This allows your car to be put in neutral without having the keys in the ignition.
Possibly bad fluid. Change it along with the fluid. Another thing to check is the brake switch that allows the shifter to move only if the brake is pressed
it is a good conductor of electricity so it allows electrical currents to flow