Cracks front axle/lens Opel Omega-B Caravan

Hello. I have the following problem with an Opel Omega-B Caravon 2.5 DTI:The left-hand steering causes a loud crackling noise from the front axle in the area of the driver’s side. This is so loud that it still makes itself noticeable in the center console. The sound can only be heard bi loaded front axle, when the car is lifted, nothing more can be heard. The FOH has already made both crossbars and carrying joints new as well as the shock absorber bearing at the front left incl. the rubber bearing of the damper, but No improvement. In the steering there is no game to be noticed, the coupling rods are also free of charge. The sound comes only with the half-dead steering wheel to the left, with a little more than a steering wheel turn to the left. It makes short “knack” and then everything is normal again. I feel the hit also in the steering wheel. it feels like a broken spring, but I had it outside today and that is absolutely fine, the rubbers at the two ends are also sitting, the shock absorbers were last week on the TüV test and were all right. Has anyone had an idea or something like that?