The other day, my '90 300SE didn't have enough juice to fire up. When I jumped it, I noticed the positive connection pretty heavily corroded.

I had the electrical system checked and needed a new battery. Turned out the PO had too small of a battery installed. It had one with 550 CCAmps and it is supposed to have 750.

Anyway, I installed the new battery and cleaned the terminals with baking soda. Today, I looked at it and the positive connection is starting to crust up a ittle.

I noticed while installing the battery that the + clamp had two nuts on it, a 13mm and a 10mm. The 10mm got snug and kept turning but wouldn't en. Could this be the cause? It seems pretty on the terminal.

The other thing I have noticed and I don't know if they are related but, when my cell phone rings, it sounds like the BRONX cheer is coming out of the radio. Also, when the phone's cigarette plug charger is about to charge the phone, I hear a small click through the radio 5 seconds before the phone indicates it's charging. Weird.

Any ideas?

Mr. BILL

90 300SE
85 300D
84 300SD (sold)

Bill,
Sounds like alternator problems. Have you checked the output of the alternator ... volts and bench test under load?

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William
76 240D (W115) - 555K miles
78 300D (W123) - 200K+ miles -- SOLD

Yes, I had it tested at AutoZone. They said the alternator and charging system was O.K.

Mr. BILL

My Cell phone , a motorola Iden 1000 on Nextel Service causes magnetic interference with most speakers including magnetically shielded computer speakers, a clicking or crackling when the phone is close enough to them. I have seen various other cell phones do this too. AT&T's digital Startac does it as well to speakers form my experience with it.

As for the battery terminal, I'm not sure if a nut that wont fully tighten is the issue, have you used any anti corrosion gel, spray or pads?

Also if the corrosion was not completely removed when the new battery was installed, I believe it can spread quicker.

I usually use a wire brush to rid my terminals and cables of the corrosion, then I use some anti corrosion stuff to prevent corrosion.

Hope that helps..

Alon

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'92 300CE
Metallic Black (Blue Flaked) on Parchment
Clear Corners
94-95 Tail-Lights
Black Grille Insert
78.5k Miles

Future Upgrades:
Sportline Suspension
17" AMG Monoblocks or EVO II's
Euro Headlights
Performance Chip
AMG Exhaust
http://home.earthlink.net/~asherson/my92300ce.jpg
Click here to Go To My 300CE Page

Good points Ashman,

I'll give the clamps a good cleaning. Also, nice to hear I'm not the only one getting rude noises from my cell phone.

By the way, nice looking sled you have there!

Mr. BILL

hehe thanks, I like my sled tremendously. so much that I stopped upgrading my computers so I can upgrade my new toy. :) hehe

Alon

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'92 300CE
Metallic Black (Blue Flaked) on Parchment
Clear Corners
94-95 Tail-Lights
Black Grille Insert
78.5k Miles

Future Upgrades:
Sportline Suspension
17" AMG Monoblocks or EVO II's
Euro Headlights
Performance Chip
AMG Exhaust
http://home.earthlink.net/~asherson/my92300ce.jpg
Click here to Go To My 300CE Page