Volkswagen Passat 1995 Official Factory Repair Manual page 2080

Motronic fuel injection and ignition system
http://ebahn.bentleypublishers.com/vw/servlet/Display?action=Goto&type=repair&id=VW.B4.FU08.24.1
Rules of cleanliness
When working on the fuel supply or fuel injection
system, the following "5 rules of cleanliness"
should be carefully observed:
Thoroughly clean all connections and the
surrounding area before disconnecting.
Place parts that have been removed on a clean
surface and cover. Use lint-free cloths only!
Carefully cover over opened components or
seal, if repairs are not carried out immediately.
Only install clean components: Only unpack
replacement parts immediately prior to
installation. Do not use parts that have been
stored loose (in tool boxes etc.)
When the system is open: Avoid working with
compressed air if possible. Do not move vehicle
unless absolutely necessary.
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12/6/2004