'76 450 SLC. Electrical issues? Please Help! - Mercedes-Benz Forum

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post #1 of 4 (permalink) Old 01-23-2010, 05:29 PM Thread Starter
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'76 450 SLC. Electrical issues? Please Help!

My name is Tyler and I recently purchased a gently used, beautiful green '76 450. It's a champ and it sings on the highway, I love this car. Yesterday morning however, I started up and drove down to Walkgreen's (block and a half away), came out five minutes later and had a dead battery (or so it appeared, no lights, wouldn't start, etc.) Walked home and got the jumper cables and drove my girlfriend's car over, but jumping wouldn't work. Took the battery in to autozone and had it tested.... good battery. Now i'm left wondering what it could be... i'm thinking short/bad connection/corroded wires somewhere along the 7 foot journey they have to take from the trunk, but i'm still not sure. When i get in and leave the door open, it buzzes at me when i put the key in and today i got the stereo to work, but if i try to start it or turn the lights off, it all goes dead. Any help at all would be much appreciated, i'd rather do this myself than take it to anyone else.
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post #2 of 4 (permalink) Old 01-23-2010, 06:26 PM
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Bad ground problem, clean the ground from the battery to the body.

'79 280CE with 226,000 miles
'76 240D 4 speed with 190,000
'85 300D Turbo with 266,000 miles

GONE but not forgotten
'76 300D with 195,300 miles
"83 300D with 174,000 miles

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post #3 of 4 (permalink) Old 01-23-2010, 06:46 PM
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Not sure on your Benz, but there could also be a ground strap from the engine to the firewall or fender well. If so, clean & re-attach at both ends.
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post #4 of 4 (permalink) Old 01-23-2010, 07:05 PM Thread Starter
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you're awesome. she's singing to me again.
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