I've never seen specific tools for them. I have a set of "hog ring" pliers that work but they're far from perfect.the special tool/pliers make it easy to install & remove 'em. I've been looking for some decent ratching ones that don't cost $50-$100.
A set of Matcos are about $200.
I wouldn't argue that they work well. I believe the criteria for a well designed part includes ease of use with common tools. Honda clamps have us discussing $200 tools and I don't think anyone would argue they're easy to work with.There are several tools available to remove and install the spring clamps.
The good part is they never loosen up and leak like the 'stainless worm-gear type'. They always keep constant tension no matter the temps.
Most home mechanics just toss the spring ones....and deal with tightening up when they have leaks.
Best thing ever invented for a hose clamp.
I shoulda spent the $200 years ago when I had it. ;-)
They woulda paid for themselves in frustration over and over. (on other cars besides the E too)
Thats how it is w/ quality tools. I've "gotten by" with crap stuff when necessary, but the longer I have the decent stuff (and the more I use 'em) the better a deal they seem to be.
For now I'll make do w/ regular pliers...."Linemans Pliers" work ok. Maybe when my kid gets a job he'll buy me some. ;-)