Operation CHARM: Car repair manuals for everyone.

Risk of Accident as a Result of Vehicle Starting Off



Risk of Accident as a Result of Vehicle Starting Off When Engine Running






Possible dangers

Risk of accident
from vehicle starting off during starting operation (e.g. when testing compression pressure) as a result of gear engaged or when engine running and vehicles with automatic transmission as a result of selector lever position "P" or "N" not engaged (with the exception of vehicles which do not have any selector lever position "P")

Risk of injury
Severe injuries may be caused by freely rotating parts in the area of the running engine. The heat produced by the engine when it is operating can result in severe burns if contact is made with individual, unshielded parts.

Rules of conduct/ Protective measures
- As a general rule, carry out work on the running engine only if this is absolutely essential.
- Before starting the engine, apply parking brake.
- On models with manual transmission, move gearshift lever into Neutral position.
- On models with automatic transmission, move selector lever into position "P" or "N" (with the exception of vehicles which do not have any selector lever position "P").
- On models which do not have selector lever position "P", secure selector lever to prevent it being operated unintentionally.
- Wear closed and close-fitting work clothes.
- Take off any jewelry, such as chains, rings etc.
- If you have long hair, wear a suitable head cover.
- Before commencing work on the running engine, check to obtain a general picture of the positioning of parts which may be hot.
- When carrying out work when starting the engine or when engine is running, do not touch any hot and rotating parts.


NOTE: Vehicles with Stop switch:
Before commencing work on the running engine, check to obtain a general picture of the positioning of the Stop switch.
If a danger exists, switch off engine with the Stop switch (S11). (On engine 904, 906, 541, 542)


First aid measures in the event of burns:
- Do not rub the part of the skin affected pour plenty of cold water over the burn and cover over with sterile bandages.
- Contact a doctor immediately.


Engine 904, 906:






Engine 541, 542: