Date registered: Jun 2019
Vehicle: 2013 S400
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2013 S400 brake issue
Hi, new to this forum.
I have a 2013 S400 with 41K on it. When it hot outside (90 degrees for example), in traffic, and at a stop light (for example) and using the brake "hold" feature, the brake takes a few seconds to release upon pressing the gas pedal. The car will not move for a few seconds regardless of how hard I press the gas pedal.
I have also noticed that when I'm in traffic -- but moving along 45-50 mph -- and then have to hit the brakes, the brakes continue to stay engaged for a second or two after I take my foot off the pedal. Clearly not a good situation. I have had it looked at and was told a new brake booster was needed ($4,000 Dealer). I found that to be odd since when it is cool out this brake problem does not happen. Having replaced a brake booster on a much older Mercedes in the past, I found this explanation hard to understand since the brakes function as they should when it is cool out and not in heavy city traffic.
Any thoughts on where to look or what could be the problem? I was told that because my rain drains on my front windshield were clogged, that water got to the brake booster and rusted it. I found that explanation to be problematic too.