If people are interested I can get my dad to write down the schematics from my LED cluster. I'm not the electrical engineer of the family.

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1981 300 SD 213k miles "Stock for now"
1999 Super Duty 7.3L 113k miles
1981 300 SD 180k miles "Heavily modified" SOLD

Good ideal to post your particular schematic. I imagine your father used one bias resistor for all the bulbs and did incorporate the dimmer. If you can describe how the light spreads across the gauge faces in comparison that would be good as well. Especially in comparison to the old bulbs. The early users of the leds had some problem with light spread.

http://**************.com has something for this, have not tried. Catalog can be difficult to navigate. If you have problems, PM me.

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83 SD

84 CD

Also, please list the source of the super white LEDs along with the schematic.

My dad is out on business until Wednesday/Thursdayish so I can get the scematics then but I do know that everything was bought at RadioShack for about $20 with the LEDs being $3-4 each.

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1981 300 SD 213k miles "Stock for now"
1999 Super Duty 7.3L 113k miles
1981 300 SD 180k miles "Heavily modified" SOLD

I recently repaired the odometer, and while there removed the instrument lite potentiometer. Cleaned the coil, and used a fine emory cloth on the wiper. The orig. lites are much brighter now.
I will ask a Bus Garage owner about the LED conversions as they are offered extensively as conversions on buses and trucks.

Will advise.

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Gary
Experience is something you get, Just after you needed it....
'99 E300 295K, '83 300D 220K, '75 240D 185K sold
'80 MCI Bus Conv DD 6V92TA, w/4 cyl. Kubota diesel GenSet 12.5KW

a lot has been discussed about this topic. If you do a search on LEDs and clusters you'll find some threads that discuss this modification in detail.

1) My experiences with LED's in the instrument cluster...so far

2) Dash is very dim

and here's one where I actually did it on my car..a long time ago..
Just sharing: My Dash Lighting Project

Hope this helps..

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Mike

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1975 200 - Sold (no pix);
1978 200 - Sold - http://www.pbase.com/hboy/redbaron
1979 300TD - Sold
http://www.pbase.com/hboy/greenwagon
http://www.geocities.com/hboy726/300TD.html
1985 230E - now my daily driver...

There was a post a while back where the person bypassed the adjustable dimmer in the dash cluster and was happy

I had the same "DIM" problem on my 84 500SEL. I cleaned the dimmer, cleaned then painted the reflectors silver (spray can from just about anywhere will be fine), and cleaned the prisms. When cleaning the prisms, use mild soap, a soft rag, and don't touch them with bare hands while puting them back in. Replaced the bulbs with 194 type and now have to turn the brightness down as they are too bright if turned up all the way. They have been this way for about 5 years now and I have had no problems. I have modified the car some, but it still looks original in every way. This method keeps the original look which is very classic.
Just my 1 cent worth (my opion isn't worth 2 cents).

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84 500 SEL (307,xxx miles)

and used this bulb http://autolumination.com/194_marker.html Keep in mind, my car is a 124 and the lights may be different. I used the ones toward the bottom of the page with the inverted lens, they send more light to the sides. Simple plug in replacement. My instrument panel is now readable at night with no mods to the reflectors or prisms. If I cleaned those it would probably be super.

I have a 4 LED bulb I am going to try next time I have the panel out. I'll report back after I try it.

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Muleears
'07 E320 Bluetec 133K my DD
'04 Jaguar XJ8 VDP, 34K
'10 Hyundai Accent 60K Grocery Getter
'02 VW Golf soon to be on the road again
'97 E300 Diesel Son's DD
'61 VERY tolerant wife

Hampton Roads, VA USA

Gone but not forgotten:
'67 250S 95K
'86 300SDL
'87 300D Turbo, 364K! R.I.P.
'98 E300 Turbodiesel, 213K
'02 S420, 164K
'01 Prius 138K