So I had a decent look........
......and have come to the conclusion that, possibly, maybe, our "best quality OEM genuine German" window seals might be multi-grooved to suit big and small back windows, and NOT of the highest quality we thought?
The rubber looks OK and feels like it should though, so I don't know. Is yours the same as this Martin?
*sigh* I knew I should have asked for a better freight quote from WCM like I've always done in the past..........