I'm sure this has been covered before ad nauseum, but for some reason I can't find a definite answer. What do I need to fix the vacuum door locks in my car? Does the W115 have vacuum pods in the doors (except driver's), trunk and fuel filler doors that would need new diaphragms, and if so, where can I purchase them other than possibly the dealership? Eventually I'm just gonna start taking door panels off and inspecting, but if there are indeed diaphragms, and they are no longer available, I'd rather not risk breaking something else needlessly while dissecting stuff. Thanks - Mike