Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

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DME Set Points



DME Set Points

Boundary conditions
- Ambient temperature approx. 20° C
- Engine temperature 90 - 95° C
- All loads switched off
- Engine idling

Nominal Values


Part 1:




Part 2:




Part 3:






NOTE: The stated values are the result of measurements of vehicles with different mileages and in perfect condition. Different values can result from diagnosis in the workshop because of mileage and environmental influence. For DME diagnosis, it is important to look at several values simultaneously and in a collective group during troubleshooting.

Example: An important collective group is formed by the following values: