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Old 11-06-2007, 08:09 AM
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Join Date: Oct 2007
Posts: 70
Dim dash lights and radio questions ('82 240D)?

My dash lights are very dim. Is there an adjustment knob for them (rheostat)?

On my stock radio, I want to upgrade to a KDC-X590. Is there an adapter pigtail that I need or is it a straight across swap?


1967 Dodge Coronet R/T (SOLD)
2001 Volvo S80 (Accident; bought by Insurance)
1996 Volvo 850 Wagon (SOLD)
1982 Mercedes Benz 240D (Accident; bought by Insurance)
1988 Mercedes Benz 300CE (Deer Strike; bought by insurance)
2002 Volvo XC70
1985 300 CD
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Old 11-06-2007, 08:51 AM
TTCummins's Avatar
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Join Date: Dec 2006
Location: Ypsilanti, Michigan
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I believe the odometer stick is the dimmer adjustment on the car. You need to try and spin it clockwise for lighter and counter clockwise for dimmer. Keep in mind these are pretty much the worst lit dashes in any car EVER. My dads 57 chevy had better lights, and that used a common ground for everything. If you have any light they are probably working normally. I am going to look around for my car, but I know there are LED conversions for some types of bulbs out there, I think there are only 4 bulbs to light the gauges so that wouldn't be to expensive.
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.
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Old 11-06-2007, 09:10 AM
85 DSEL's Avatar
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Location: Dayton, Ohio
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Last week I took my cluster apart, cleaned it, fixed my clock, actually placed all my instrumentation into a 'new' cluster housing (my old one had some cracks in it), and replaced the three main larger bulbs that provide the light for the cluster. One thing I did before putting it back together was to take some HVAC foil tape and stuck it in side the white plastic housings for the bulbs. All I can say is, I CAN ACTUALLY SEE MY INSTRUMENTS AT NIGHT!

that makes me happy... !
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Old 11-06-2007, 08:02 PM
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Join Date: May 2007
Location: Madison Heights, MI
Posts: 11
Yup, the rheostat is on the left of the Spedo. That was one of the first things I had to replace when I first got my 240D. No contact cleaner would fix it. Just had to replace it. That with some new bulbs (blue extra bright xenon if I remember correctly) made my dash just fine.
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Old 11-06-2007, 09:00 PM
toomany MBZ's Avatar
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Location: central Va
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You can jumper your current rheostat, just solder the leads on the back, no need to replace.
83 SD

84 CD
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