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E-Class (W124) 1984-1995: E 260, E 300, E 320, E 420, E 500 (Includes CE, T, TD models)

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Old 10-31-2010, 09:15 AM   #1
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Join Date: Mar 2010
Posts: 215
Drives: 1994 E220 Coupe
When should brake lines be changed?

I am going tomorrow to buy new rotors/pads/sensors for the car and doing a brake bleed.
I was wondering, how often should the brake lines be changed?

The car has 62,000 miles, rotors never changed before. They feel a bit warped, and have had 2-3 brake pads through them since new.
The brake pedal travels down a lot, and it actually takes quite a bit of force on it for them to work. So, first few inches of travel is soft and does nothing, last inch does something but is somewhat hard to press.

Brake fluid hasn't been changed since new I believe
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Smoke Silver 1994 E220 Coupe Automatic
0 kilometers 6 September 1994
100,635 kilometers - 6 September 2010
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Old 10-31-2010, 11:40 AM   #2
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Brake lines should be inspected for any cuts or signs of been dry rotted or frayed. This may be caused by fair wear and tear or by aging of the material. Faulty brake lines can collapse under pressure blocking the flow of fluid; causing the brakes to lock up or brake uneven. Its a no brainer considering the cost and the ease of replacing. The replacement brake lines from my 300D cost about $16.00 each. If you decide to replace (which you should); start to bleed from the wheel furthest to the master cylinder and work your way to the closest last; you may require an assistant for this. Also pay close attention to the brake fluid requirements for your Benz.
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Old 10-31-2010, 05:18 PM   #3
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And if they visually look fine, it's ok to leave them as is?
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Old 10-31-2010, 05:25 PM   #4
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Drives: 1991 300D 2.5 Turbo Diesel
If you dicide or not is your call. I would replace or flush the brake fluid regardless. It absorbs moisture and should be replaced around.every 3 years.
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Old 11-09-2010, 01:55 PM   #5
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Quote:
Originally Posted by spetz View Post
And if they visually look fine, it's ok to leave them as is?
I agree. Unless the lines are abraded, a wheel gets hot, or the car pulls drastically, I wouldn't waste the money. In years long passed brake hoses, belts, and coolant hoses needed to be changed routinely along with master cylinders. Rubber product quality has drastically improved over the years. I can't remember when I last changed a master cyl.
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Old 11-09-2010, 04:57 PM   #6
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Drives: w124 OM606
do the fluid... but dont bother replacing the lines unless theyre showing some bulges, or are rubbing/worn down in spots or have rusty fittings
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Old 11-09-2010, 04:57 PM
 
 
 
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300d, brake, car, change, changed, faulty, hoses, inspected, lines, replace, replaced, rubber, tear, w124, wear



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