Bosch MOT 240 Operating Instructions Manual page 54

English
The connecting of testers close to the engine and to the ignition system must be executed only when the
!
engine does not turn and the ignition circuit is switched off.
The symbolic pictures which are printed on the front panel of your tester are intended for remind you
always of this source of dangers.
54
Refer to the operating instructions
Connect testers to the engine ground or to the
battery (B-) before switching on the ignition.
Switch off the ignition before disconnecting the
tester from the engine ground or the battery (B-).