Wiring harness tape

It's called 'friction tape' and is available from McMaster Carr, I am sure other like Grainger would carry it. HTH

For add on items, a small diagram in a plstic baggie taped to the radio for example, you could do it Milspec and use all white with number tags on each wire, that would seperate any confusing colour clashes with stock harness like the SRS harness is.

 

Even easier, I bought some from Home Depot.

 

What about one of those little labelling machines? Produces a neat self adhesive labels. I used one of these to re-label my fuse board covers. Then I found I got two lines of small font text on the label and could wrap these around the end of a spade connector cover... If you need a slight longer message fold it to itself like a flag. Not perfect, but neat enough for the inside of a dashboard?

Cost from £20 in the UK, whats that... about $35?
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I have found that using those labels folded over a wire and stuck to itself flag-style doesn't stay stuck for very long. They start to separate after a few months and fall off after a year. YMMV.

 

Wurth make the sticky cloth tape, which is Sh** to work with. Your local Mercedes dealer can provide you with a cloth tape that is adheasive on one side and dry on the other, only one like this I have found. Works great, and looks fantastic. PM me and I will try to dig up the part number and a picture if your interested. Cost is about $15 a roll.

 

I've had very good luck with the professional type made for marking wires. Mine are made by WireMold. I've had them on my 330 for 15+ years with none coming off.

 

I've never really liked the gooey residue the sticky tape leaves on the wires. I prefer zip ties in assorted sizes.

The trick to zip ties is to practice how to cut the excess flush with the block, so you don't have the sharp end sticking out.
The other trick is to have a large supply on hand, so you use enough to prevent strain points at too-widely spaced zip ties.

 

Electronics supply shops also sell the "shrink tubing" which can be used to insert the wires through, then heat up with a heat gun, and shrink to a nice package. Your photo shows some shrink tubing.

Dave Helms (Scuderia Rampante) provided that on my wiring harness fix for the Mondial t fusebox.

 

The cloth tape is available from a firm called “Tesa”. It’s called cloth wire loom tape. It is also heat resistant which makes it ideal for engine compartments too.