Just trying anything to get my radio to work I have determined that the constant power wire running the radio is not getting power. I made a jumper wire from the switched power that tells the radio when to turn on and looped it to the constant power and voila radio baby!! All of a sudden my clock roars to life and things couldn't get any better. So my question is obviously there is a break in the constant power somewhere. My fuse panel label card is trashed due to water intrusion (which may also explain my electrical problems) into the fuse box. Can anybody with a 124 scan their fuse card to help a brother out so I might be able to find what fuse I need to change?

Thanks in advance

Kurt Kiefer

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2003 Dodge Ram 2500 Cummins - Georend fully built trans, Banks Big Hoss Bundle, Smarty Tuner, 5" turbo back exhaust. 500 HP and 1100 ft/lbs to the ground.
1979 Mercedes-Benz 300CD - Lost to a four car pile up on 275, Thank You Michigan Drivers.
1986 Mercedes-Benz 300D - Sold, Euro non-turbo car.

My hazard lights work now too. Nobody on here has a fuse card left in their car to look at? I don't even need a scan, just to know where the constant power fuse goes.

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2003 Dodge Ram 2500 Cummins - Georend fully built trans, Banks Big Hoss Bundle, Smarty Tuner, 5" turbo back exhaust. 500 HP and 1100 ft/lbs to the ground.
1979 Mercedes-Benz 300CD - Lost to a four car pile up on 275, Thank You Michigan Drivers.
1986 Mercedes-Benz 300D - Sold, Euro non-turbo car.

I don't have a W124, but at least on the W123 card the radio is only listed once. Not sure just what that means, but I assumed that all of the radios needed the constant power as well as the switched power?!?

At any rate on 123's the radio is on fuse 4.

By the way the clock and hazard warning system is on fuse 2, so maybe that is where the constant power is supposed to come from. Fuse 2 is listed as a 8-amp, and fuse 4 is listed as 16-amp if there is a radio.

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1961 190Db retired
1968 220D/8 325,000
1983 300D 164,150

Bump, still looking for a scan or copy of the fuse ID card in a 124

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2003 Dodge Ram 2500 Cummins - Georend fully built trans, Banks Big Hoss Bundle, Smarty Tuner, 5" turbo back exhaust. 500 HP and 1100 ft/lbs to the ground.
1979 Mercedes-Benz 300CD - Lost to a four car pile up on 275, Thank You Michigan Drivers.
1986 Mercedes-Benz 300D - Sold, Euro non-turbo car.

Forget about the card. Probably just as easy to check ALL of the fuses.

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'95 E300 Diesel, 264,000 Miles. [Sold it]

On a 124128 ('90 300D) the fuse is #1 16 amp.

I doubt the card will tell you anything about 'constant" power. I had the same trouble with the clock and radio only working when the car was going (W123) so I rigged a "hot" jumper into the line that feeds the clock. Now all is well again.

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1985 Euro 240D 5 spd 140K
1979 240D 5 spd, 40K on engine rebuild
1994 Dodge/Cummins, 5 spd, 121K
1964 Allice Chalmers D15 tractor
2014 Kubota L3800 tractor
1964 VW bug

"Lifes too short to drive a boring car"

I installed a CD player in my 1983 300D (W123) and I noticed that the constant hot lead went back under the center console towards the hazard light switch. I peeked under there and sure enough there was a "tap" off of the power feed for the switch. I don't think the factory put a constant hot lead in my car as it only had a cassette player with no clock and would have had no need for one. I think the W124 has the flasher in the same place so you could do this trick if some reason you don't ever get the fuse situ worked out (or there is a short in the lead)...

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~Sugi
1983 300DT
1964 Triumph TR4 (back in the stable after 18 years- same car!)
2004 Pontiac Vibe
1986 Honda Elite CH250
1971 F100