Volkswagen Passat 1995 Official Factory Repair Manual page 3469

Anti-lock Brake System (ABS) and ABS with Electronic Differential Lock (ABS/EDL), Teves 20 GI
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Safety precautions
WARNING!
Brake fluid is poisonous.
CAUTION!
Before working on the ABS or ABS/EDL
system, disconnect the battery Ground
(GND) strap. For anti-theft coded radios, first
make sure that the radio code is available.
Brake fluid must not contact painted parts.
Brake fluid absorbs moisture from the air
and must therefore be replaced every two
years. Use only new, approved brake fluid
that complies with MVSS 116 DOT 4.
DO NOT use silicone-brake fluid (DOT 5).
Even the smallest traces can cause sever
corrosion in the brake system.
Before doing any welding repairs on the
vehicle using electric welding equipment,
disconnect the ABS control module.
After work that requires opening the brake
hydraulic system, bleed the system
47-29 .
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12/7/2004