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Home >> Mercedes Benz >> 2009 >> S550 Base >> Repair and Diagnosis >> General Information >> OEM General Information >> Overall Vehicle -- Safety Precautions -- S-Class (221) >> Safety Precautions >> Risk of accident caused by vehicle starting off on its own when jacked up. Risk of injury caused by rotating parts when working on running engine or drive train. - AS00.00-Z-0008-01A

Risk of accident caused by vehicle starting off on its own when jacked up. Risk of injury caused by rotating parts when working on running engine or drive train. - AS00.00-Z-0008-01A

Ensure that jack stands have secure and adequate footing. 

An authorized person must occupy the driver seat. 

Wear closed and snug-fitting work clothes. 

Do not touch hot or rotating parts. 

Potential risks 

Risk of accident 

caused by vehicle driving off on its own when under operation (e.g. during tests) with engine running and gear engaged. Danger caused by vehicle falling off the jack stands. 

Risk of injury 

Caused by exposed rotating parts next to the running engine and around the drive train which can cause serious injuries  .

Because the engine heats up when operating, serious burns can be caused by touching unshielded parts.

Safety instructions/precautions 

First aid measures for burns