500SEL (126.037) V8-5.0L (117.963) (1984)
1
Unscrew all spark plugs.
2
Crank engine several times to expel residues and soot (selector lever in position N or P).
3
Push compression pressure recorder into spark plug hole of the respective cylinder.
4
For testing, crank engine about 8 revolutions with throttle valve open.
Test all the cylinders in this way. Move test sheet into the relevant position in compression pressure recorder before testing each cylinder.