300D-"contact spring for radio interference suppressor" what is it? - Mercedes-Benz Forum

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post #1 of 3 (permalink) Old 01-24-2011, 10:02 PM Thread Starter
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Date registered: Dec 2009
Vehicle: 1976 300D
Location: Tabaco City, Philippines
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300D-"contact spring for radio interference suppressor" what is it?

i have my 1976 300D benz with manual transmission..i was a third owner, and was not a mechanic myself..everytime i have a problem with my benz, i first visit Model 123 Maintenance Manual Index site to research on the problem. the site was useful..i do some jobs myself and sometimes look for a mechanic. just recently, i had a problem with my front axle..upon disassembly of the parts, i found no part for "contact spring for radio interference suppressor" as mentioned in the site. what is it? was my benz lacking that part? please give some information. thanks a lot..
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post #2 of 3 (permalink) Old 01-25-2011, 02:27 AM
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That part is a small piece of copper fashioned to be instered in the end of the spindle and the other end contacts the dust cap. The purpose is to short the static buildup to ground, through the tires. Perhaps some previous owner saw it and tossed it in the garbage.

Typically static buildup is not a problem in the summer and FM radio is unaffected by it.

Near Manassas Va. '65 220S, 2006 Ford Crown Victoria Police Interceptor, '99 Volvo V70, '72 350SL 4 speed

Not part of the in-crowd since 1952. It's BRAKES not breaks. You break a bone, use brakes to stop your car. /rant

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post #3 of 3 (permalink) Old 01-25-2011, 02:37 AM
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If it doesn't have a contact spring, it was not installed with one.

Radio interference (from the ignition, electric motors etc, but also rotating parts) in cars is a problem and various ways have been developed to counter the problem.
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