Re: (jet18.t1900)
85(?), 87, 89, and 91 were the WB years here in the US.
The badge that you are thinking of is not a WB edition badge... I have a few and I'll take a pic when I get home. The US WB editions had minor upgrades (like mentioned, fabric, etc). I have seen a Jetta G:L WB edition at the yard with no power options, no cruise, a sunroof, and the 91-92 fabric. It was probabaly a 91, and it was tan. it also was labeled Jetta GL on the back. In Germany, WB meant something, that might be the confusion (since you called Germany, they might have interpeted you wrong). All it comes down to is the WB was a special package with badges, maybe a few standard accessories, and differnet seats (the 89 with blue interiors had the blue striped Helios Recaro fabric, for example, in both GL and GLI form).
Wolfsburg was an addition to any car, not Just GLs. You could get a WB base, and a WB GLI as well. A WB Golf was available in 90 (or was it 91?) along with a WB GTI. Not all WB's were made in Germany (the Golf can attest to this, as no Golfs destined for the US came from Germany, and there are WB editions of those).