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Founding Member 2006
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112,729 Posts
have you undimmed them with the buttons on the side of the console binnacle?
 

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Founding Member 2006
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112,729 Posts
Product Font Screenshot Rectangle Software
 

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*Registered
2011 SLK350 (R171)
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12 Posts
Discussion Starter · #4 ·
If the needles can be dimmed independently of the numbers around the guages then no. I could not see any way to do that in the manual I have been referencing (car didn't come with a manual).
 

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Founding Member 2006
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112,729 Posts
so you talking tach and speedo needles are too dim but others are ok?
 

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Founding Member 2006
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112,729 Posts
so you have tried to use those buttons to adjust brightness of dash?
 

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2011 SLK350 (R171)
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12 Posts
Discussion Starter · #7 ·
I can see the fuel gauge and clock just fine at night, just not tacho and speedo needles. The numbers can go dark or bright using the buttons.
Did not seem to change the needle lighting.
 

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Founding Member 2006
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112,729 Posts
humor me
are you checking in a dark garage or outside when dark?
are your lights on position 2 or auto?
has it ever worked right?
 

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Founding Member 2006
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112,729 Posts

clean this sensor...

 

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2011 SLK350 (R171)
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12 Posts
Discussion Starter · #10 ·
I will try to clean those sensors.

When I have fiddled with it, it has been dark, otherwise I don't notice.

Typically I have the lights set to auto but others have driven the car.

To be honest I don't know for sure they ever worked. I bought it during early 2020 the owner has passed away. For a long while I wasn't going hardly anywhere, let alone at night.
 

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2011 SLK350 (R171)
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12 Posts
Discussion Starter · #11 ·
Here are 2 shots of the speedo part of the dash with a tarp over the car. One has full dim and the other full bright.

The needles for the clock as well as numbers change in brightness using the buttons, but the needle on the speedo does not change.

It is the same situation for tacho/gas.
Gauge Measuring instrument Font Circle Auto part
Gauge Speedometer Measuring instrument Odometer Font
 

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Founding Member 2006
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112,729 Posts

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Founding Member 2006
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112,729 Posts
check fuse 30 and 51... instrument cluster for giggles

 

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2011 SLK350 (R171)
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12 Posts
Discussion Starter · #14 ·
Both fuses are ok. Pulled them they aren't open and put them back. No change.

I also have a mysterious red led on the door lock that flickers at times. If I understand things, it is related to the alarm, but why it flickers sometime I don't know.

A few months back I had a bad battery and lots of weird things were happening.

Now in the winter here (Vancouver) it sometimes gets crazy moisture inside if I am not running it regularly.

As there are no obvious things, I am thinking that there is some corrosion somewhere.

I am guessing I would need to open the dash next, but if that is the case, I will stop for now. I have no room in my garage for prolonged work.

I can use the digital speedo and I don't need to see the tacho.
 

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Founding Member 2006
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112,729 Posts
ahhh so you still have a 'bad' battery? was it replaced with new?
 

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*Premium Member
2005 SLK55 AMG /2005 SLK350
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6,751 Posts
I have no idea what's wrong, but It's very simple to remove the instrument cluster, no other items besides the two small trim panels need to come off.
 

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2011 SLK350 (R171)
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12 Posts
Discussion Starter · #18 ·
Ok, thanks. Maybe I will look around for instructions and try that. Probably everything is within connectors, ICs, circuit boards and won't be much to see but one never knows...
 

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2009 SLK55 AMG w/P30
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1,493 Posts
If the needles can be dimmed independently of the numbers around the guages then no. I could not see any way to do that in the manual I have been referencing (car didn't come with a manual).
You can find manuals online. I keep the OEM one in the car down in our parkade so I have a PDF of the 2009 SLK in my computer.
 
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