Hello SL 107 owner, I have, like many other owners of a USA import, the old Chrysler air conditioning system with the infamous heating servo in the engine room. This part was broken with me, like many others. I then repaired it a year ago provisionally elaborately. (Did I describe in the Motor Talk if anyone cares) However, he has now acknowledged his service again. This proved to be very nice again by the fact that the servo motor did not enter the parking position I decided to take some money in my hand and repair the entire system. There are basically four possibilities: 1.) The sad : Selling a car 🙂 The most affordable : All (almost all) vacuum lines Throw out bridges, air-conditioning servo, build in hot water lines bridges and a manual valve (see Mercedessource) —> I don’t think a R107 is worthy ;-). 3.) A new, outdated (Alubody) Order servo ex USA, is at 400-1000 € + tax, advantage : again original, disadvantage: in x years you are again on this page :-D. 4.) Order the electronic solution from Mercedesfix (you can also order from Unwiredtools, but then costs the double !). This replaces the vulnerable amplifier AND the servo. I decided for option 4.. Price : almost 400$ with transport + 45 € tax. Delivery time approx. 2 weeks The parts arrived today (joy), the one construction instruction is extensive and well described. Is not a witchcraft ;-). I will take care of it and report on it on the weekend.