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Thread: Break fluid top off - DOT 4+ or 4?

  1. #1
    Senior Member
    Join Date
    Feb 2006
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    199

    Break fluid top off - DOT 4+ or 4?

    Hey all. My break fluid is kinda low so i need to top it off. Unfortunately i can't find DOT 4+ fluid anywhere. All i get is 4. I was wondering can i mix dot 4 with 4+ i already have? What will happen if i do so?
    Thanks, i allways count on you guys
    2004 S500

  2. #2
    Senior Member
    Join Date
    Nov 2004
    Posts
    1,757
    dot 4 is sufficient.

    nenad
    2002 S500
    2002 CLK430 w/ 5.5L swap
    2002 SLK32 AMG
    2003 S430 w/ 5.0L swap
    2000 ML55 AMG

  3. #3
    whitec230k - please respond to my emails and PMs..
    2006 WRX Limited
    1998 C280

  4. #4
    Senior Member
    Join Date
    Mar 2006
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    1,884
    Originally posted by jnenad16
    dot 4 is sufficient.

    nenad
    also, low levels of brake fluid could be warning signs. with brakes being almost perfectly sealed, and little or no trouble of evaporation, low brake fluid could mean a small leak somewhere.

    another reason why brake fluid may be low is if the pad life is almost exhausted (low fluid resuliting from brake pads being completely worn out, and all caliper pistons fully extended).

    just a heads up, i always inspect the brakes if the fluid drops.

  5. #5
    Senior Member
    Join Date
    Feb 2006
    Posts
    199
    Originally posted by Proven Guilty
    also, low levels of brake fluid could be warning signs. with brakes being almost perfectly sealed, and little or no trouble of evaporation, low brake fluid could mean a small leak somewhere.

    another reason why brake fluid may be low is if the pad life is almost exhausted (low fluid resuliting from brake pads being completely worn out, and all caliper pistons fully extended).

    just a heads up, i always inspect the brakes if the fluid drops.

    Thanks for all the help guys. Ill be taking the car for service b in about 3000 miles so they'll preform a break check in that to. btw how much does the flat fee of 'service b' cost?
    2004 S500

  6. #6
    Senior Member
    Join Date
    Jul 2005
    Posts
    1,037
    Call the dealer and ask!!
    99 C43 AMG
    99 C230 Kompressor

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