12 00... Instructions on compression testing

WARNING: This page is about a different car, the 2013 BMW M3, 2012 BMW M3, and 2011 BMW M3. However, it is still accessible from the selected car via links, so may be relevant.

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)!