This thread and similar ‘leaking window‘ threads have me wondering about prevention. My mind started to race down a few rabbit holes, but here it goes.
First, a few questions to ponder, directed to those with the actual experience of the issues.
1. Is the root cause of the issue the drain design; the poor manufacture of the drain system; the seal design; or the poor manufacture of the seal?
2. Does the root cause fix (such that the problem will never ever occurs) involve VW altering its design of one or more of the parts?
3. Have modified or corrected parts been fitted by VW (And was this a success)?
4. Is there any experience of VW undertaking any scheduled inspection or maintenance?
IF the conclusion is that it’s down to a poor design, which isn’t being corrected by VW, AND that VW aren’t doing any scheduled maintenance or inspection, then perhaps as owners it’s down to us to devise some preventive maintenance/ inspection tasks.
For instance, consider how long it takes for the drain to become blocked (mean time between failures), and then think of a simple test to see if it is actually blocked, at about half the expected MTBF. (period could be fine tuned depending on local conditions).
If the test shows the drain to be blocked, what remediation task is needed to clear it (without causing damage or other failures)?
Realistic approach?
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