Mystery fuse box

While troubleshooting a blower problem on my '92 300TE, I noticed a small (1"x1.5") fuse box located on top of the driver's side strut. The box has
positions for 2 fuses but has NO fuses in it. The box has two wire entering the box - one red and one red/white.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
Add image file
Upload is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here. All logos and trade names are the property of their respective owners.