dave783 Posted September 12 Share Posted September 12 Greetings to everyone 1996, 124 E280 estate, 5-speed gearbox, 333,000 kilometres. Recently, I saw that the rear windscreen wiper did not activate when reversing, despite the front wiper functioning. Inspected the reverse lights and saw that they were nonfunctional as well. The neutral safety switch, located on the left side of the gearbox where the shifter connects to the transmission, has been diagnosed. The neutral safety switch, identified by component number A 00 054 549 06 from Nemigaparts.com, is no longer manufactured by Mercedes-Benz. The vehicle is scheduled for diagnostics at the shop tomorrow, however their accuracy is not guaranteed. Is this component probable modifiable in situ, or is it a part that often fails and requires replacement? Are there any other potential causes for these symptoms? An online video disassembly of the component reveals that it has a rather basic switch. Any guidance would be welcomed. Thank you. Quote Link to comment Share on other sites More sharing options...
bvlenci Posted September 12 Share Posted September 12 Consider consulting your nearest Porsche dealership. I acquired mine from Porsche for €60 compared to €95 from Mercedes-Benz. Quote Link to comment Share on other sites More sharing options...
bvlenci Posted September 12 Share Posted September 12 There is an abundance of items available on eBay. Quote Link to comment Share on other sites More sharing options...
dave783 Posted September 12 Author Share Posted September 12 Thank you, everyone. Indeed, I observed many on eBay; nonetheless, I am apprehensive about installing a component that is already deteriorated. Will the Porsche component be identical to the Mercedes-Benz part? It seems that some components are shared. Quote Link to comment Share on other sites More sharing options...
bvlenci Posted September 12 Share Posted September 12 I believe that is quite probable, provided they still possess it. The 928 used the 722.3 gearbox. My gearbox is the 722.5, which is derived from the 722.3 but has an additional fifth gear. Therefore, it is likely identical to yours, correct? Quote Link to comment Share on other sites More sharing options...
dave783 Posted September 12 Author Share Posted September 12 I had always aspired to drive a 928. I have just retrieved the vehicle from the repair shop, where it was indicated that the selection module switch, located inside the shifter mechanism behind the polished hardwood centre console, is likely the issue. I possess no knowledge on this subject. Has anybody encountered this component before? I am contemplating if the use of contact cleaner into the shifter gate might effectively cleanse the switch. They will investigate the matter and respond to me. I will keep you informed. Quote Link to comment Share on other sites More sharing options...
bvlenci Posted September 12 Share Posted September 12 Do not apply excessively. Detach the trim and switches, then cleanse the switches using a high-quality contact cleaner. Non-standard WD-40. Subsequently, reconstruct. You may need to erase error codes like I did, but because yours is a newer model, I will refrain from further commentary until I have had less alcohol. Keep us informed. Quote Link to comment Share on other sites More sharing options...
dave783 Posted September 12 Author Share Posted September 12 The garage did not respond to my inquiry yesterday on the selection module switch, and I am uncertain about the specific item in question. My mechanical skills have deteriorated compared to their previous state. Experts on vintage automobiles are becoming scarce. The former proprietor of the establishment could detect these issues instantaneously. However, when seeing my wife reverse the vehicle in Lidl's parking lot, I saw that both the reversing lights and the back wiper were functioning. I now possess the most lamentable of flaws - an intermittent one. Should I persist with my ongoing enquiries? Affirmative! Certainly. What grounds do you have for doubting me? The MOT is scheduled for March, allowing me plenty time. I will provide an update when I obtain further information. Quote Link to comment Share on other sites More sharing options...
bvlenci Posted September 12 Share Posted September 12 Two switches are present for the 722.5 gearbox: E/S and 4/5th. I resolved four-fifths of the gear issues by detaching and cleaning the switches using premium electrical contact cleaner. Under no circumstances should regular WD40 be used. Your symptoms, in my opinion, do not indicate issues with those switches, provided that the 4th and 5th gear shifts are functioning well. Quote Link to comment Share on other sites More sharing options...
dave783 Posted September 12 Author Share Posted September 12 Indeed, the 4/5 change is functioning as intended, and the gearbox is operating well. The E\S switch is also functional. Currently, there is an occasional issue where a switch fails to activate the reverse lights when I shift into reverse. I first thought it was the neutral safety switch; however, it seems to be something else. I will contact my technician to ascertain the component more precisely. He seemed uncertain as well. Quote Link to comment Share on other sites More sharing options...
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