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Old 05-09-2010, 02:31 AM
sptt's Avatar
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Join Date: Sep 2009
Location: Orange County, California
Posts: 691
300E Doorlocks & Radio

Recently my 91 300E's doorlocks stopped working when turning the key in the driver's side to autolock and to unlock all doors (also the at the trunk). At the same time, my radio would almost turn on but then it would shut numbers or readout would show on it. I thought that I either had a vacuum leak for the doorlocks or the pump had failed. I also thought the radio had had it at the same time. From reading through these threads I checked fuse "C" and lo and behold, all was still good! The contacts on the fuse had oxidized so bad there was no contact. I scraped both ends on the sidewalk to make it shiny and new and both issues were immediately fixed! Just thought I'd throw that out there as I almost went and popped for a new radio head unit and was about to tear apart my seats for a vacuum leak or bad hose connection. Cheers!
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Old 05-09-2010, 12:08 PM
big dog 2's Avatar
Join Date: Feb 2005
Location: Elk Grove, Ca
Posts: 206

Reminds me when my blower motor quit working recently. I thought blower motor, regulator, climate control unit and tearing out everything to get to them. Turned out to be a little strip fuse under the hood that cost just a few dollars to replace and almost no effort. Just got old and brittle.

1989 300E

2005 Acura TL

2011 Hyundai Elantra Limited

Swing hard! Take chances!
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Old 05-09-2010, 12:28 PM
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Join Date: May 2009
Posts: 398
Yes there are many threads about corrosion and the old aluminum fuses. got to the auto store and get all new copper fuses of the same type. Finally the US did something right by german autos on that one.
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Old 05-11-2010, 02:46 AM
sptt's Avatar
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Join Date: Sep 2009
Location: Orange County, California
Posts: 691
Yes...I've learned to check those fuses first! My daughter also had the blower motor strip fuse issue and it was easily repaired. Now, if only the transmissions were as simple!
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