12 00 ... Instructions on compression testing

Cars with automatic transmissions:

• Select drive position "P"
• Apply handbrake

Cars with manual transmissions:

• Move gearshift lever to neutral position
• Apply handbrake

Turn off ignition.

Disconnect DME master relay. This ensures that the DME control unit does not actuate the ignition coils.

If this procedure is not observed:

• High voltage! - Mortal danger! 
• Damage to DME control unit (ignition final stages)!