> I need help badly. I need to access the engine compartment and I cannot
> unlock my rear hatch to open it. I've followed the owner's manual
> instructions, but still no open. Please help me.

One thing you might try: instead of turning the key in the rear lock
the direction it goes 90 degrees (I forget if it's clockwise or
counter clockwise), turn it the OPPOSITE direction. If it turns about
15 degrees, try holding it turned like that and push in the button by
pushing on the key.

A friend of mine had a similar problem with his Syncro where the rear
lock motor wouldn't push the actuator all the way. By only partially
turning the key cylinder we were able to get it to open the latch by
"reaching diagonally", so to speak.