Mercedes-Benz 600 SEL 1993 Owner's Manual page 122

Spark Plugs
Remove and install spark plugs
only with socket wrench from the
vehicle tool kit or a recommended
spark plug wrench.
Tightening torque: 1 5 - 2 2 ft.lb.
(20 - 30 Nm).
For approved spark plugs see
''Technical Data" .
120
Layout of Poly-V-belt Drive
1 Automatic belt tensioner
2 Crankshaft
3 Air conditioning compressor
4 Fan
5 Air pump
6 Alternator
7 Idler pulley
8 Power steering pump
9 Coolant pump
For dimensions of the poly-V-belt,
see Technical Data in Index.