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  #1  
Old 02-23-2003, 11:06 PM
zorin's Avatar
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Join Date: Feb 2003
Location: Ottawa, Canada
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erratic light dimming

I experince erratic light dimming (fluctuation) on my '86 300E after it reaches the operating temperature. Can anybody shed some light on it!

Thanks.
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  #2  
Old 02-24-2003, 01:54 AM
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Location: LEMONT-CHICAGO
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you could possibly have a bad diode in the alternator. It will result in normal function of most of the electrical system but may exhibit some "spikes" that will cause flickering of the lights which is most noticeable at idle and low speeds.
I had a problemwith the lights flickering and a new alternator fixed it.
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  #3  
Old 02-24-2003, 03:30 PM
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Thanks. I will take the Alternator out and have it checked. Is it OK to drive the car like this for a while?
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  #4  
Old 02-24-2003, 04:12 PM
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If the fluctuation is engine speed related, a weak battery is another possibility - monitoring the voltage across it will be a good indicator. A bad (resistive) fuse could be the culprit if the battery voltage does NOT vary.

Steve
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  #5  
Old 03-08-2003, 11:45 PM
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Location: east of Atlanta, north of Macon Ga
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New twist to flicker

I thought I was seeing things but mine flickers (and not all of the time) at highway speeds, other times not and I have bright burning lights not dim. Any ideas??
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1991 300SE (my ride, 279,000 miles, looks almost new
1954 Cadillac (21 yo son's car, he bought when age 15)
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  #6  
Old 03-09-2003, 01:31 PM
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zorin

do you have a big powerful subwoofered sound system?

if so, this could be the reason for this.

peter
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  #7  
Old 03-09-2003, 09:13 PM
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Question Hmmm, I dunno....

.....if it's a mega sub woofer set-up. All I know is that the original window sticker (yes, it has survived intact for 12 years) says that it was equiped with a "premium sound system" that does tend to thump and bump when cranked up. The dash unit says "Mercedes-Benz" an AM-FM stereo cassette unit.
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1991 300SE (my ride, 279,000 miles, looks almost new
1954 Cadillac (21 yo son's car, he bought when age 15)
1972 SeaBird 19 ft runabout (old but solid, slant six, Volvo sterndrive perfect condition, undergoing complete overhaul and refit)
1998 Toyota Rav4 (my sons daily driver when he is in the Continental US, PROUDLY serving in US Navy)
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