Tomorrow, everyone bought me a Smart 451, which had a defective clutch/actuator when they bought it. Both were renewed by Sachs spare parts. The switching actuator and the new clutch were both learned and adjusted with a tester. The Smart runs so well. Only I have the problem that if I reach a speed of 110 KMH, no acceleration is possible any more, it feels like the clutch is slipping. That’s how long it takes until the big A and two wrenches start flashing in the gear indicator. After that it is no longer possible to turn on into the fifth gear. The Smart was yesterday also with Mercedes and got a new gearbox software. Unfortunately in vain! Does anyone of you know, or do I really have to buy a new gearbox?