« Reply #5 on: 06 July 2014, 20:08 »
Bleeding (normal):
Adhere strictly to work sequence when bleeding brake system.
– Connect brake filling and bleeding equipment -VAS 5234-.
– Open bleeder valves in specified order and bleed brake calipers.
1 - Front left brake caliper
2 - Front right brake caliper
3 - Rear left brake caliper
4 - Rear right brake caliper
Use suitable bleeder hose. It must sit tightly on bleeder valve so that no air can enter brake system.
– Leave bleeder valve of each brake caliper open with bleeder hose fitted until brake fluid discharges free of air bubbles.
Subsequent bleeding
Carry out subsequent bleeding when:
t brake pedal travel is too long or so-called »soft brake pedal«
t in vehices with EDL, EDL/TCS or EDL/TCD/ESP a chamber in the brake fluid reservoir is completely empty. This occurs e.g. in the case of brake system leaks.
Subesquent bleeding requires the assistance of a second mechanic:
– Depress brake pedal firmly and hold.
– Open bleeder valve on brake caliper.
– Fully depress brake pedal.
– Close bleed valve with brake pedal held down.
– Release brake pedal slowly.
This bleed sequence must be carried out 5 times per brake caliper.
Bleeding sequence:
1 - Front left brake caliper
2 - Front right brake caliper
3 - Rear left brake caliper
4 - Rear right brake caliper
A road test must be carried out after the brakes have been bled. When doing this an ABS regulation must be performed at least once.
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