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Old 08-30-2001, 02:48 PM
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Electrical failure

Hello All! I haven't seen this site for a while because I've been busy. I like the new look!! The search function seems better as well. However I couldn't find a reference to my problem.

My A/C compressor, brake lights, temp gauge, oil pressure all quit working at the same time. Could someone suggest what common components I should look at?

All fuses in the fuse box near the firewall are OK.

Thanks in advance for the help.
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Old 08-30-2001, 05:02 PM
Ashman's Avatar
Service Advisor
Join Date: Sep 2000
Location: Sherman Oaks, CA
Posts: 4,748
What year, and model of car?

That would help for starters in diagnosing your problem.

Sometimes fuses look ok but they aren't. When I first bought my car, first thing I did was change every fuse for a brand new one.

If your car has an OVP, this could also cause weird problems. Try searchign for ovp, over volt protection relay, OVR, and any combination and see what you come up with.

The OVP can be the culprit of any number of problems, but that doesn't mean it applies to your car.

Post what model and year, it will better help those trying to help you figure out your problem.

'92 300CE - Sold
2004 C240 - C7 Wheels
2015 ML350 - P1, Pano, Ash poplar wood, Sport Dinamica interior, Running Boards Keyless go.
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Old 08-30-2001, 10:53 PM
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Join Date: Jan 2001
Location: Mission Hills in the City of San Diego
Posts: 2,352
Yeah, agree with Alon, change all fuses, there can be hairline cracks undetectable to the naked eye. THough probably not applicable to due multiple failure at once. Cheap though. Maybe there is a relay that combines these features.... ?

2006 E350 w/ 155k miles (Daily Driver)

1993 300E 3.2L Sedan w/ close to about 300k miles
2003 E500 Brilliant Silver (Had 217k miles when totalled!)
1989 300E with 289,000 miles (had for <1 yr while in HI)
03 CLK 500 cabrio (Mom's)
2006 C230k (Dad's)
1999 S420 (Mom's/Dad's)
2000 C230k Sport sedans
2001 CLK320 Cabrio (Mom's)
1995 C280 My First Mercedes-Benz... (155k miles. EXCEPTIONAL AUTOMOBILE. Was Very hard to let go of!)
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Old 08-31-2001, 01:18 AM
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Oh Yes, that may help! My car is a 1987 190E 2.3.

Speaking of fuses...How do you get the lid off of the "fuse box"? I could raise the front enough to get my hand in to remove and replace fuses, but it was a very tight fit.

I suspect a relay. I have the repair CD, but it would help to know what parts are common to all those components.
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Old 08-31-2001, 03:06 AM
Ashman's Avatar
Service Advisor
Join Date: Sep 2000
Location: Sherman Oaks, CA
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It should only have one clamp, unless yours has side clamps

'92 300CE - Sold
2004 C240 - C7 Wheels
2015 ML350 - P1, Pano, Ash poplar wood, Sport Dinamica interior, Running Boards Keyless go.
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Old 09-04-2001, 12:14 AM
Posts: n/a
Fuse Container

The lid has one clamp in the front. When that is undone, the lid will open to about 30 degrees. I can barely get my hand in there, but it requires a bit of dexterity to remove or replace a fuse. There is also some type of apparatus on the back that can be removed, but that doesn't seem to affect the position of the lid.

Anyway, the problem I am most concerned about is my brakelights. They are not working. The fuse is good. The bulbs are good.

The only clue I have is that my A/C, oil pressure, fuel gauge, and temperature gauge (maybe other things as well) went down with the tail lights.

Can anyone suggest common components to look at first? What devices would all these systems share?

Thank you for your help.
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Old 09-04-2001, 12:51 AM
Join Date: Jul 2001
Location: Old Lyme, Connecticut
Posts: 3,596

I believe all these things are on the same fuse. I had a center mounted stop light installed on my car by the agent I hired to federalize it (1986 190E 2.3-16) that died after a few years. I removed it as it started rattling and never repaced it. Anyway, my young son (probably 6 at the time) found these two wires on the shelf behind his seat and naturally tied them together. Well, as soon as I put the brakes on the fuse blew and my rpm indicator and everything else on the dash died. It took me a few fuses to make the connection to the brake and then the wires in the back window.... but it was solved for good when I separated the wires and replaced the fuse the last time. Good Luck, Jim
1986 Euro 190E 2.3-16 (291,000 miles),
1998 E300D TurboDiesel, 231,000 miles -purchased with 45,000,
1988 300E 5-speed 252,000 miles,
1983 240D 4-speed, purchased w/136,000, now with 222,000 miles.
2009 ML320CDI Bluetec, 89,000 miles

1971 220D (250,000 miles plus, sold to father-in-law),
1975 240D (245,000 miles - died of body rot),
1991 350SD (176,560 miles, weakest Benz I have owned),
1999 C230 Sport (45,400 miles),
1982 240D (321,000 miles, put to sleep)
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