This question will probably label me as anal retentive - but here goes.

'92 300SE. The washer reservoir level indicator does not function properly. I've replaced the original with a MB part, but when the reservoir is full to the top, the float in the tube does not show full.

Originally, I thought it might be an issue if all water was used, vs the specified mix of washer fluid and water, but that didn't make any difference.

Is this float level indicator a known problem on these cars, or is mine just trying to irritate me?

I know I have a light on the dash that does illuminate when the fluid gets low, but it bugs me that the indicator under the hood doesn't show full when full is the condition.

Any ideas?