Chris NottAH Fabrications
Results 1 to 6 of 6
  1. #1
    Reverse Gear

    Status
    Offline
    Join Date
    Jan 2009
    Posts
    8

    A4 2.0 TDI Multitronic brake clunk on hill start

    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.

  2. # ADS
    ADS
    Join Date
    Always
    Posts
    Many
     
  3. #2
    pin
    Reverse Gear

    Status
    Offline
    Join Date
    Jan 2006
    Location
    UK
    Posts
    25
    Isn't this just hill start assist, http://www.audi.com/com/brand/en/too...t.browser.html

    Mine does that, when I start away on a hill

  4. #3
    Igdos's Avatar
    2nd Gear

    Status
    Offline
    Join Date
    Nov 2008
    Location
    UK
    Posts
    321
    Quote Originally Posted by pin View Post
    Isn't this just hill start assist, http://www.audi.com/com/brand/en/too...t.browser.html

    Mine does that, when I start away on a hill
    Hill start assist would be activated only if the OP was facing UP the slope to prevent the car rolling backwards.
    A3 Sportback 2.0 TDI 140 Sport S-Tronic (8P3)

    Aruba Blue

    Alu Roof Rails*Cruise*BOSE*USB

  5. #4
    Reverse Gear

    Status
    Offline
    Join Date
    Jan 2009
    Posts
    8
    yes I am facing up the slope, so i guess that it is the hill start assist.

    thanks.

  6. #5
    pin
    Reverse Gear

    Status
    Offline
    Join Date
    Jan 2006
    Location
    UK
    Posts
    25
    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.

  7. #6
    Igdos's Avatar
    2nd Gear

    Status
    Offline
    Join Date
    Nov 2008
    Location
    UK
    Posts
    321
    Quote Originally Posted by pin View Post
    I thought I was going mad when I saw Igdos' post
    Now having re-read what I'd put I agree 100% :-)
    A3 Sportback 2.0 TDI 140 Sport S-Tronic (8P3)

    Aruba Blue

    Alu Roof Rails*Cruise*BOSE*USB

 

 

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Single Sign On provided by vBSSO

Garage Plus, Vendor Tools vBulletin Plugins by Drive Thru Online, Inc.

Content Relevant URLs by vBSEO