I have tried several times to have a company tour at Karmann, as my car was
largely built there, as you correctly mention (CLK Cabrio). For over a year
they were closed to tours because of preparations for the new CLK cab. I
found this a ridiculous excuse: does Mercedes stop tours because it is
tooling up for a new model? Of cours not. OK, Karmann is a small company
without the resources to have tours that avoid parts of the plant...
Anyway, after 3 years (but only 17 000 miles / 27K km) I don't appear to
have any rust, but I shall remember to look more carefully...
The car recently passed it's first 'MoT' test (Ministry of Transport road
test), which every car in GB has to undergo annually on reaching its third
birthday. Rust is a criterion. (In concept similar to TUeV test.)
Needless to say that in our our Feb 93 190 we have come across no rust.
On the other point, my understanding was that the W208 CLK Cab had the least
scuttle among all the similar convertibles sich as the Saab, BMW et al.
For direct contact replace nospam with schmetterling