brake problem after pads replaced. - PeachParts Mercedes-Benz Forum

Douge · #1 05-26-2009, 12:40 AM

Quote:

Originally Posted by Benz300

so my question is, should i simply wait and see or ...?
it's like when i press the pedal the response time of the brakes is in one sec lag or so... not too assuring.

You need to properly bleed them and after that I would give it a couple hundred miles. My guess is you will have a lot more confidence after the hydraulics are sorted.

Have you checked your brake fluid reservoir to see if your indie bothered to top it off after the service?

And for your question about the ignition. With the ignition off, you can still get fluid through the system but with a lot more effort, with the car on and the vac boost assist you get a lot more pressure through the system ensuring all the air is bled out of the line. It can be done with it off, but it is far more advantageous and a no brainer to do it with the engine on.

Ferdman · #2 05-26-2009, 05:04 AM

Benz300, a competent mechanic would not let a car leave his shop with the brake system not functioning properly. Demand that the mechanic pull all 4 wheels and verify that the new brake pads are installed properly. Have him explain to you exactly what he did when replacing the brake pads. Unless he opened the bleed valves when retracting the caliper pistons there really should be no need to bleed the brake system. It's best to use a pressure bleeder on MB brake systems. You don't mention new wear sensors; hopefully you bought them for the new brake pads and the mechanic installed them also.

tinypanzer · #3 05-26-2009, 11:07 PM

Yes, seriously. A good wrench wouldn't be able to sleep with you driving around on questionable brakes.

lkchris · #4 05-27-2009, 01:09 PM

It's pretty difficult to install pads incorrectly, but mechanic did have to retract the caliper pistons to install them.

Figure 95% that the problem is between the brake fluid reservoir and the calipers and only 5% that it's pad installation.

Bleed the brakes.