| Notes for repair work on ABS, ABS/EDL |
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| Before carrying out repair work on the anti-locking system, determine the cause of the fault using self diagnosis → VAS 5051. |
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| Before working on the ABS, ABS/EDL system, disconnect the battery earth strap. On vehicles with coded radio, obtain coding. |
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| When working with brake fluid, observe the valid, relevant safety precautions and notes, → Chapter. |
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| Bleed brake system with Brake filling and bleeder unit -SAT 1150- after completing repairs where the brake system was opened → Chapter. |
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| During the final road test, ensure that a controlled brake test is performed at least once (pulsations must be felt at the brake pedal). |
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| Absolute cleanliness is required when working on the anti-locking brake system, it is not permitted to use any products which contain mineral oils, such as oils, greases etc. |
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| Thoroughly clean all unions and the adjacent areas before loosening, do not use aggressive cleaning agents such as brake cleaner, petrol, thinners or similar. |
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| Place removed parts on a clean surface and cover. |
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| After separating the control unit/hydraulic unit use the transportation protection for the valve dome. |
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| Carefully cover or seal open components if repairs cannot be carried out immediately.(Use sealing plugs repair kit -1H0 698 311 A-. |
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| Do not use fluffy cloths. |
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| Only remove replacement parts from packaging immediately prior to installation. |
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| Only use genuine packed parts. |
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| When the system is open do not work with compressed air and do not move the vehicle. |
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| Ensure that no brake fluid enters plug connectors. |
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