My tailgate opened more and more heavily over time. One had to lift it up in the end. At the last service with the friendly one it was said: oh ever, there have to be all the dampers out, that is a huge effort, that is expensive. So you left it. Today it got too stupid for me, am at the friendly to sell parts and see there: both parts together cost 27 EUR incl. VAT. The installation is done in 3 minutes, the things are only cracked! Now it does again like new. Int It is interesting that there are probably two numbers for the same original part: A1729800264 and A1729800464. Both look the same, the same manufacturer (Stabilus), both 400N. FAZIT: Unfortunately you sometimes get really nonsense told by the friendly one. What you can do yourself saves some clearly money.