W126 Instrument Panel Removal
Highly specialized tool available at your local dry cleaners. 
Insert highly specialized tool between IP and dash, then turn hook toward the IP. Note hooking point is lower half of IP side 
Hook grabs IP at point indicated. If you have an adjustable steering wheel, move it to the fully extended position to give room for removing the IP. When disconnecting the wires and cables, pay attention to placement of the free clock power supply upon removal, as it is hot. 
IP on bench. Tach/clock on left, speedometer/odometer in center, and engine/fuel instrument on the right. Speedometer must be removed first. 
Arrows highlighting the simple components of the trip reset linkage. Lubricate these components with petroleum jelly. 
I failed to take a picture of the reset mechanism on the trip meter
