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#1
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Instument cluster/console lights
I have a 1980 MB 300D. I have a problem I need some help/advice with please. The problem is that the instrument cluster and console lights ( air conditioning/defrost lights) are not lighting up when I turn on the light switch. I have replaced all the bulbs in the clusters and checked the main fuses . So all of those are good as far as I know.
I would REALLY appreciate ANY help/suggestions as far as where to look now. Cant drive at night without knowing how fast I am going .... Thank you !!!! |
#2
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On the lower edge of the instrument cluster is the little rheostat knob which controls the brightness. Rotate that back and forth about 200 times, the carefully rotate it slowly until you find the "sweet spot" where the lamps stay on.
A lot of people ultimately just bypass the rheostat by soldering a jumper wire across it.
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Palangi 2004 C240 Wagon 203.261 Baby Benz 2008 ML320 CDI Highway Cruiser 2006 Toyota Prius, Saving the Planet @ 48 mpg 2000 F-150, Destroying the Planet @ 20 mpg TRUMP .......... WHITEHOUSE HILLARY .........JAILHOUSE BERNIE .......... NUTHOUSE 0BAMA .......... OUTHOUSE |
#3
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Instrument lights/console
On My 1980 MB 300d the instrument lights/console lights are not lighting up after replacing fuses and all bulbs. (I just aquired this car) it was suggested that I check the light adjuster (variable rheostat) at the bottom of the cluster. My question is .. where is it located? I dont see it on the front and I dont see it on the back either. Is there even one on this car?If so ... where?
Thank you for your help !!! |
#4
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Re: Instument cluster/console lights
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NormanB 230 TE (W124) 1989 with 153,000 miles on the clock - hoping for at least another 100K |
#5
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instrument lights/console lights
I have a 1980 MB 300D that I recently aquired. The instrument lights (ones for night time driving) are not working. All other lights are working on the dash, ie, glow plug /turn signal/E Brake/seat belt lights.
I have replaced the bulbs /checked fuses /checked connections, and so far nothing. I would really appreciate the help of anyone who has had a similar problem or has the technical expertise to suggest other things that I could try . Thank you ALL for your help ! Randy |
#6
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In the row of warning lights (battery, seat belt, brakes, etc) along the lower edge of the instrument cluster, there should be 2 little knobs about 1/4 inch diameter. The one on the right adjusts the clock. The one on the left is the instrument light rheostat. With the speedometer at rest, the speedo needle will be more or less pointing at the rheostat. Also, when you push that knob, it resets the trip odometer. (Don't push it when the car is in motion.) It's 99% guaranteed that your lighting problem is because the rheostat is dirty. Just keep rotating it back and forth until the lights want to stay on. You will find that you need to do this 2 or 3 times a year.
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Palangi 2004 C240 Wagon 203.261 Baby Benz 2008 ML320 CDI Highway Cruiser 2006 Toyota Prius, Saving the Planet @ 48 mpg 2000 F-150, Destroying the Planet @ 20 mpg TRUMP .......... WHITEHOUSE HILLARY .........JAILHOUSE BERNIE .......... NUTHOUSE 0BAMA .......... OUTHOUSE |
#7
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It appears that there is a bulb in the upper left and the upper right portions of the cluster.
The one on the right side is out on my cluster. I suppose I can rule out the rheostat on that? Also, my trip odometer "sticks" at 99.9 miles. It just clicks and clicks but can't get over it to 100.0. It will reset and go back to 0 and is fine for 99.9 miles. Just wondering since it is the same button.
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1994 C280, dark green metallic 105k miles 1991 190E 2.6, Black 191,500 miles (sold to another forum member) 2003 Chevy Tahoe LT, Redfire Metallic 105k miles 1989 Mustang GT Cobra Convertible 43k miles |
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