Author Topic: brake problems, horn sounding intermittently.  (Read 1824 times)

mgmoore

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brake problems, horn sounding intermittently.
« on: September 04, 2018, 21:03:24 »
Hi All,


Took my 230sl out today for a drive and came home. Went to park the car in the garage and noticed that the brake pedal was virtually on the floor. Checked the fluid reservoir and it's full? Don't know when the fluid was last changed but master cylinder and brake servo looks to be quite new. Is it worth bleeding the system first to check for trapped air before purchasing another master cylinder?

Next new issue is when you turn the steering wheel the horn starts to sound intermittently. Have removed the steering wheel to reveal a copper ring beneath. Is it possible to adjust the ring downwards to prevent contact when turning the steering wheel?   

Thanks for the advice,

Matt

Kevkeller

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Re: brake problems, horn sounding intermittently.
« Reply #1 on: September 05, 2018, 16:19:52 »
I’d definitely try bleeding but it sounds like the master cylinder might be bad.   Did this change happen immediately or was it gradually getting worse?
It’s been a long time since I took my steering apart, I can’t remember.
1970 280 SL

ja17

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Re: brake problems, horn sounding intermittently.
« Reply #2 on: September 08, 2018, 16:31:50 »
Slop in the horn ring, usually causes horn issues. Look for missing rubber buffers, missing spring, pinched wire. 
Joe Alexander
Blacklick, Ohio
1969 Dark Olive 280SL
2002 ML55 AMG (tow vehicle)
2002 SLK32 AMG (350 hp)
1982 300TD Wagon turbo 4spd.
1963 404 Mercedes Unimog (Swedish Army)
1989 flu419 Mercedes Unimog (US Army)
1998 E430
1974 450SLC Rally
1965 220SE Finback