This is not true. When you change the length of any of the factory links/arms (in this case, the camber arm)... the toe adjustment WILL be affected. The car should have an alignment at the MB dealership after installing the camber arms. You'll need to tell them what you want the rear camber set to (probably -0.5° to -1.0° would be fine). In extreme cases (massive lowering + camber correction) there may not be enough toe adjustment, in which case you can use the factory toe eccentric bushing, but that's $$$. Both my 500E's needed additional toe adjustment (more than the factory toe links would allow) after installing RDM TEK camber correction kits. Adding the eccentric bushing cured it. Dealer alignment sheet is at
this link.
Bottom line: If you don't get an alignment after installing non-factory camber arms, you're risking unstable handling at high speeds, and/or increased tire wear. If the rear toe is way out, it can still shred your rear tires even without a lot of negative camber. Don't ask how I know this.
