Master cylinder ........cold snap?
 

I had the local Indy working on the coupe and of course he had to do a
test drive.......brakes were "spongy"

He claimed that this was most likely caused by a cold snap we had the other week and that it was a common problem on the older benz's
Anyone else heard of this?

If the brakes are spongy....do they feel spongy to you? You are used to the car and are probably a better judge than he.....they probably need bleeding.

I don't know how the cold would have anything to do with that.

Tom W

I can't honestly answer that question. I have had the car about 3 months now and have only driven it twice. Once when I test drove it, and later I
drove it part way back from the GTG down here. At that time, I felt that they were a little softer then the D but not "spongy".
My wife took it out and back, and did comment on the brakes being spongy on the way back, but can't remember them being that way on
the way there.




Oh, she did say it had more power then the D.......yup, she lit um up:rolleyes:.

I dont know how cold your "cold snaps' are there but I've never had that problem (or herd of it) and we get in the low twenties, not so cold to some folks more inland, I know.

THAT IS BS!!!!! I have been designing brake system components for 12 years. I had the same thing happen in my 1981 300D. One chamber in the reservoir was low (the low level warning system in the reservoir does not work, no surprise) on fluid and had draw air into one line. I filled the reservoir and bleed the brakes...problem fixed.

OEM's in different parts of the world have different design ideas on brake fluid capacity and usage and I do not expect anyone outside of a dealer ship of a make to understand any model of car in this capacity. I could teach a class on this. It is another reason why I am not warm to US OEM's.

What was the reason for the 'test drive'? I do not perform all of my maintenance. If I do not perform the work I only take to places that I know that some one is going out for some frivolous 'test drive'.

yeah, what they said. spongy means air. totally fill the brake reservoir and start bleeding at the furthest wheel and continue to the front.

I had him put in the trans vacuum modulator.