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A4 2.0 TDI Multitronic brake clunk on hill start

Discussion in 'Audi S4/A4/A4 Cab (B7 Chassis)' started by sclamb, Jan 24, 2009.

  1. sclamb
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    sclamb New Member

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    Been reading here for a while and finally have something to ask so here goes with something that I noticed today.

    I have a February 08 (B7) A4 2.0 TDI S-Line Multitronic.

    At night I park my car on a sloping driveway, and I reverse onto the drive so that the car faces forward ready for the morning. If I select R(everse), back onto the driveway and then stop by applying the foot brake, select D(rive) and then release the foot brake I hear a clunk as soon as the brake pedal reaches the top of its travel. There is no judder, just the sound. If I reverse, then stop by applying the foot brake and then select S(port), N(eutral) or P(ark) I do not hear the clunk when I release the foot brake. If the car is on level ground and I reverse, then stop by applying the foot brake, select Drive and then release the foot brake I do not hear the clunk when I release the foot brake and it reaches the top of its travel.

    So, I only hear this clunk when the car is on a slope, I reverse, apply the foot brake, select D(drive) and then release the foot brake. It happens right at the top of the foot brake pedal travel and it is only a sound, there is no judder.

    Does anyone else hear this and/or know what causes it.

    Thanks for any help.


    As an aside, I have remapped the ECU using the Chipped UK ST3 and the Fast Road map. What a difference - it feels like a new car with much smoother power delivery. The re-mapping did set three DTCs in the Instrument, ABS and Air Bag control units as they lost communication with the ECU, but a quick scan and reset with VCDS sorted that out.
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  2. pin
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    pin New Member

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  3. Igdos
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    Igdos Member

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  4. sclamb
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    sclamb New Member

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    yes I am facing up the slope, so i guess that it is the hill start assist.

    thanks.
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  5. pin
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    pin New Member

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    I thought I was going mad when I saw Igdos' post ;)

    Mine doesn't "clunk" as much as make a noise, noticeable but as you say no judder or anything.
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  6. Igdos
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    Igdos Member

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    Now having re-read what I'd put I agree 100% :)
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