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Old 10-01-2002, 09:55 AM
Manuel 300CE
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partially inoperable horn buttons -- W124

on my 93 300CE, the horn buttons seem to be stuck.

- the left side button works ok
- the right side button does not make contact -- horn does not blow when pressed

Has anyone encountered this, and how much does it typically cost?? I am hesitant to do a DIY due to the airbag.

Thanks -- Manuel

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Old 10-03-2002, 01:10 AM
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Join Date: Sep 2002
Location: Los Angeles
Posts: 963
Here is what I did for a look see when I had (and still have) a flashing SRS light.

After checking the archives it was suggested to check the contact rings. You can take a look back there and see if there is anything obvious like the contact rings (about $80) or the contact bushings. There are many warnings to proceed with caution and some suggesting not to muck around at all in the steering column and airbag unless you have good manuals. I found one post that described the process as pretty easy so I plunged ahead. Proceed as you would when working on a computer, i.e. make sure you are grounded. Unhook the negative battery lead. Wait 20 minutes. Two #27 Torx screws on the backside of the steering wheel hold the airbag on. The screws are captive so they don't fall out when fully loosened. Lift the airbag up gently. It has one electrical connection on the back to pry off. Set the bag aside (far away!). Remove the 10mm allen bolt holding the steering wheel on. Mine was on there pretty good. A couple of raps and WD40 and a pipe wrench come-a-long finally broke it loose. There was blue resin on the threads, LocTite?. Note the marks on the wheel and the steering shaft before removing wheel. Now you can check out the ring and the copper contact bushings.


glenmore
1991 300CE, 114k

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