{"id":16537,"date":"2025-07-28T13:55:03","date_gmt":"2025-07-28T13:55:03","guid":{"rendered":"https:\/\/www.cnautotool.com\/blog\/?p=16537"},"modified":"2025-07-28T13:55:03","modified_gmt":"2025-07-28T13:55:03","slug":"how-to-fix-mb-star-c6-multiplexer-disconnecting-and-reconnecting-during-diagnostics","status":"publish","type":"post","link":"https:\/\/www.cnautotool.com\/blog\/how-to-fix-mb-star-c6-multiplexer-disconnecting-and-reconnecting-during-diagnostics\/","title":{"rendered":"How to Fix MB Star C6 Multiplexer Disconnecting and Reconnecting During Diagnostics"},"content":{"rendered":"<p data-start=\"169\" data-end=\"399\"><strong data-start=\"169\" data-end=\"190\">Problem Overview:<\/strong><br \/>\nWhile performing vehicle diagnostics using the MB Star C6 multiplexer, the device intermittently disconnects and then reconnects on its own. This issue can prevent successful diagnostics and disrupt workflow.<\/p>\n<hr data-start=\"401\" data-end=\"404\" \/>\n<p data-start=\"406\" data-end=\"583\"><strong data-start=\"406\" data-end=\"457\">Issue 1: Unstable Connection During Diagnostics<\/strong><br data-start=\"457\" data-end=\"460\" \/><em data-start=\"460\" data-end=\"474\">Observation:<\/em><br data-start=\"474\" data-end=\"477\" \/>During diagnostics, the MB Star C6 suddenly loses connection with the system and reconnects shortly after.<\/p>\n<p data-start=\"585\" data-end=\"598\"><a href=\"https:\/\/www.cnautotool.com\/blog\/how-to-fix-mb-star-c6-multiplexer-disconnecting-and-reconnecting-during-diagnostics\/mb-star-c6-multiplexer-disconnects-and-reconnects-during-diagnostics-1\/#main\" rel=\"attachment wp-att-16545\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-16545\" src=\"https:\/\/www.cnautotool.com\/blog\/wp-content\/uploads\/2025\/07\/MB-Star-C6-Multiplexer-Disconnects-and-Reconnects-During-Diagnostics-1.jpg\" alt=\"\" width=\"1000\" height=\"562\" srcset=\"https:\/\/www.cnautotool.com\/blog\/wp-content\/uploads\/2025\/07\/MB-Star-C6-Multiplexer-Disconnects-and-Reconnects-During-Diagnostics-1.jpg 1000w, https:\/\/www.cnautotool.com\/blog\/wp-content\/uploads\/2025\/07\/MB-Star-C6-Multiplexer-Disconnects-and-Reconnects-During-Diagnostics-1-300x169.jpg 300w, https:\/\/www.cnautotool.com\/blog\/wp-content\/uploads\/2025\/07\/MB-Star-C6-Multiplexer-Disconnects-and-Reconnects-During-Diagnostics-1-768x432.jpg 768w\" sizes=\"(max-width: 1000px) 100vw, 1000px\" \/><\/a> <a href=\"https:\/\/www.cnautotool.com\/blog\/how-to-fix-mb-star-c6-multiplexer-disconnecting-and-reconnecting-during-diagnostics\/mb-star-c6-multiplexer-disconnects-and-reconnects-during-diagnostics-2\/#main\" rel=\"attachment wp-att-16544\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-16544\" src=\"https:\/\/www.cnautotool.com\/blog\/wp-content\/uploads\/2025\/07\/MB-Star-C6-Multiplexer-Disconnects-and-Reconnects-During-Diagnostics-2.jpg\" alt=\"\" width=\"1000\" height=\"562\" srcset=\"https:\/\/www.cnautotool.com\/blog\/wp-content\/uploads\/2025\/07\/MB-Star-C6-Multiplexer-Disconnects-and-Reconnects-During-Diagnostics-2.jpg 1000w, https:\/\/www.cnautotool.com\/blog\/wp-content\/uploads\/2025\/07\/MB-Star-C6-Multiplexer-Disconnects-and-Reconnects-During-Diagnostics-2-300x169.jpg 300w, https:\/\/www.cnautotool.com\/blog\/wp-content\/uploads\/2025\/07\/MB-Star-C6-Multiplexer-Disconnects-and-Reconnects-During-Diagnostics-2-768x432.jpg 768w\" sizes=\"(max-width: 1000px) 100vw, 1000px\" \/><\/a><\/p>\n<p data-start=\"585\" data-end=\"598\"><em data-start=\"585\" data-end=\"596\">Response:<\/em><\/p>\n<ul data-start=\"599\" data-end=\"787\">\n<li data-start=\"599\" data-end=\"714\">\n<p data-start=\"601\" data-end=\"714\">Check your distance from the vehicle. The issue may be related to weak WiFi reception on the diagnostic laptop.<\/p>\n<\/li>\n<li data-start=\"715\" data-end=\"787\">\n<p data-start=\"717\" data-end=\"787\">Ensure the device is placed outside the car for a clearer signal path.<\/p>\n<\/li>\n<\/ul>\n<hr data-start=\"789\" data-end=\"792\" \/>\n<p data-start=\"794\" data-end=\"1066\"><strong data-start=\"794\" data-end=\"866\">Issue 2: Diagnostics Cannot Start Due to Lost Multiplexer Connection<\/strong><br data-start=\"866\" data-end=\"869\" \/><em data-start=\"869\" data-end=\"883\">Observation:<\/em><br data-start=\"883\" data-end=\"886\" \/>The system fails to initiate diagnostics due to constant disconnection from the multiplexer.<br data-start=\"978\" data-end=\"981\" \/>User reports that after restarting the entire setup, the system begins to work again.<\/p>\n<p data-start=\"1068\" data-end=\"1081\"><a href=\"https:\/\/www.cnautotool.com\/blog\/how-to-fix-mb-star-c6-multiplexer-disconnecting-and-reconnecting-during-diagnostics\/mb-star-c6-multiplexer-disconnects-and-reconnects-during-diagnostics-3\/#main\" rel=\"attachment wp-att-16543\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-16543\" src=\"https:\/\/www.cnautotool.com\/blog\/wp-content\/uploads\/2025\/07\/MB-Star-C6-Multiplexer-Disconnects-and-Reconnects-During-Diagnostics-3.jpg\" alt=\"\" width=\"1000\" height=\"562\" srcset=\"https:\/\/www.cnautotool.com\/blog\/wp-content\/uploads\/2025\/07\/MB-Star-C6-Multiplexer-Disconnects-and-Reconnects-During-Diagnostics-3.jpg 1000w, https:\/\/www.cnautotool.com\/blog\/wp-content\/uploads\/2025\/07\/MB-Star-C6-Multiplexer-Disconnects-and-Reconnects-During-Diagnostics-3-300x169.jpg 300w, https:\/\/www.cnautotool.com\/blog\/wp-content\/uploads\/2025\/07\/MB-Star-C6-Multiplexer-Disconnects-and-Reconnects-During-Diagnostics-3-768x432.jpg 768w\" sizes=\"(max-width: 1000px) 100vw, 1000px\" \/><\/a> <a href=\"https:\/\/www.cnautotool.com\/blog\/how-to-fix-mb-star-c6-multiplexer-disconnecting-and-reconnecting-during-diagnostics\/mb-star-c6-multiplexer-disconnects-and-reconnects-during-diagnostics-4\/#main\" rel=\"attachment wp-att-16542\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-16542\" src=\"https:\/\/www.cnautotool.com\/blog\/wp-content\/uploads\/2025\/07\/MB-Star-C6-Multiplexer-Disconnects-and-Reconnects-During-Diagnostics-4.jpg\" alt=\"\" width=\"1000\" height=\"562\" srcset=\"https:\/\/www.cnautotool.com\/blog\/wp-content\/uploads\/2025\/07\/MB-Star-C6-Multiplexer-Disconnects-and-Reconnects-During-Diagnostics-4.jpg 1000w, https:\/\/www.cnautotool.com\/blog\/wp-content\/uploads\/2025\/07\/MB-Star-C6-Multiplexer-Disconnects-and-Reconnects-During-Diagnostics-4-300x169.jpg 300w, https:\/\/www.cnautotool.com\/blog\/wp-content\/uploads\/2025\/07\/MB-Star-C6-Multiplexer-Disconnects-and-Reconnects-During-Diagnostics-4-768x432.jpg 768w\" sizes=\"(max-width: 1000px) 100vw, 1000px\" \/><\/a><\/p>\n<p data-start=\"1068\" data-end=\"1081\"><em data-start=\"1068\" data-end=\"1079\">Response:<\/em><\/p>\n<ul data-start=\"1082\" data-end=\"1287\">\n<li data-start=\"1082\" data-end=\"1187\">\n<p data-start=\"1084\" data-end=\"1187\">According to the engineer, signal interference in the workshop could be causing unstable connections.<\/p>\n<\/li>\n<li data-start=\"1188\" data-end=\"1287\">\n<p data-start=\"1190\" data-end=\"1287\">In factory tests, the MB Star C6 WiFi connection remains stable up to 10 meters from the vehicle.<\/p>\n<\/li>\n<\/ul>\n<hr data-start=\"1289\" data-end=\"1292\" \/>\n<p data-start=\"1294\" data-end=\"1471\"><strong data-start=\"1294\" data-end=\"1346\">Issue 3: Diagnostic Failure on Multiple Vehicles<\/strong><br data-start=\"1346\" data-end=\"1349\" \/><em data-start=\"1349\" data-end=\"1363\">Observation:<\/em><br data-start=\"1363\" data-end=\"1366\" \/>The user reports that this is the second vehicle since Saturday where diagnostics could not be performed.<\/p>\n<p data-start=\"1473\" data-end=\"1486\"><a href=\"https:\/\/www.cnautotool.com\/blog\/how-to-fix-mb-star-c6-multiplexer-disconnecting-and-reconnecting-during-diagnostics\/mb-star-c6-multiplexer-disconnects-and-reconnects-during-diagnostics-5\/#main\" rel=\"attachment wp-att-16541\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-16541\" src=\"https:\/\/www.cnautotool.com\/blog\/wp-content\/uploads\/2025\/07\/MB-Star-C6-Multiplexer-Disconnects-and-Reconnects-During-Diagnostics-5.jpg\" alt=\"\" width=\"1000\" height=\"562\" srcset=\"https:\/\/www.cnautotool.com\/blog\/wp-content\/uploads\/2025\/07\/MB-Star-C6-Multiplexer-Disconnects-and-Reconnects-During-Diagnostics-5.jpg 1000w, https:\/\/www.cnautotool.com\/blog\/wp-content\/uploads\/2025\/07\/MB-Star-C6-Multiplexer-Disconnects-and-Reconnects-During-Diagnostics-5-300x169.jpg 300w, https:\/\/www.cnautotool.com\/blog\/wp-content\/uploads\/2025\/07\/MB-Star-C6-Multiplexer-Disconnects-and-Reconnects-During-Diagnostics-5-768x432.jpg 768w\" sizes=\"(max-width: 1000px) 100vw, 1000px\" \/><\/a><\/p>\n<p data-start=\"1473\" data-end=\"1486\"><em data-start=\"1473\" data-end=\"1484\">Response:<\/em><\/p>\n<ul data-start=\"1487\" data-end=\"1767\">\n<li data-start=\"1487\" data-end=\"1588\">\n<p data-start=\"1489\" data-end=\"1588\">The engineer found that the device was connected via WiFi using a C4 device ID instead of the C6.<\/p>\n<\/li>\n<li data-start=\"1589\" data-end=\"1664\">\n<p data-start=\"1591\" data-end=\"1664\">The correct WiFi name should match the serial number of your C6 device.<\/p>\n<\/li>\n<li data-start=\"1665\" data-end=\"1767\">\n<p data-start=\"1667\" data-end=\"1767\">Ensure the correct WiFi network (matching your C6 serial) is selected to allow proper communication.<\/p>\n<\/li>\n<\/ul>\n<p><a href=\"https:\/\/www.cnautotool.com\/blog\/how-to-fix-mb-star-c6-multiplexer-disconnecting-and-reconnecting-during-diagnostics\/mb-star-c6-multiplexer-disconnects-and-reconnects-during-diagnostics-6\/#main\" rel=\"attachment wp-att-16540\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-16540\" src=\"https:\/\/www.cnautotool.com\/blog\/wp-content\/uploads\/2025\/07\/MB-Star-C6-Multiplexer-Disconnects-and-Reconnects-During-Diagnostics-6.jpg\" alt=\"\" width=\"999\" height=\"562\" srcset=\"https:\/\/www.cnautotool.com\/blog\/wp-content\/uploads\/2025\/07\/MB-Star-C6-Multiplexer-Disconnects-and-Reconnects-During-Diagnostics-6.jpg 999w, https:\/\/www.cnautotool.com\/blog\/wp-content\/uploads\/2025\/07\/MB-Star-C6-Multiplexer-Disconnects-and-Reconnects-During-Diagnostics-6-300x169.jpg 300w, https:\/\/www.cnautotool.com\/blog\/wp-content\/uploads\/2025\/07\/MB-Star-C6-Multiplexer-Disconnects-and-Reconnects-During-Diagnostics-6-768x432.jpg 768w\" sizes=\"(max-width: 999px) 100vw, 999px\" \/><\/a> <a href=\"https:\/\/www.cnautotool.com\/blog\/how-to-fix-mb-star-c6-multiplexer-disconnecting-and-reconnecting-during-diagnostics\/mb-star-c6-multiplexer-disconnects-and-reconnects-during-diagnostics-7\/#main\" rel=\"attachment wp-att-16539\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-16539\" src=\"https:\/\/www.cnautotool.com\/blog\/wp-content\/uploads\/2025\/07\/MB-Star-C6-Multiplexer-Disconnects-and-Reconnects-During-Diagnostics-7.jpg\" alt=\"\" width=\"560\" height=\"589\" srcset=\"https:\/\/www.cnautotool.com\/blog\/wp-content\/uploads\/2025\/07\/MB-Star-C6-Multiplexer-Disconnects-and-Reconnects-During-Diagnostics-7.jpg 560w, https:\/\/www.cnautotool.com\/blog\/wp-content\/uploads\/2025\/07\/MB-Star-C6-Multiplexer-Disconnects-and-Reconnects-During-Diagnostics-7-285x300.jpg 285w\" sizes=\"(max-width: 560px) 100vw, 560px\" \/><\/a><\/p>\n<hr data-start=\"1769\" data-end=\"1772\" \/>\n<p data-start=\"1774\" data-end=\"1968\"><strong data-start=\"1774\" data-end=\"1792\">User Feedback:<\/strong><br data-start=\"1792\" data-end=\"1795\" \/>After correcting the WiFi connection to the appropriate C6 network, the device started working correctly again.<br data-start=\"1906\" data-end=\"1909\" \/><strong data-start=\"1909\" data-end=\"1922\">Feedback:<\/strong> \u201cIt seems to be working again. Thanks a lot!\u201d<\/p>\n<p data-start=\"1774\" data-end=\"1968\"><a href=\"https:\/\/www.cnautotool.com\/blog\/how-to-fix-mb-star-c6-multiplexer-disconnecting-and-reconnecting-during-diagnostics\/mb-star-c6-multiplexer-disconnects-and-reconnects-during-diagnostics-8\/#main\" rel=\"attachment wp-att-16538\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-16538\" src=\"https:\/\/www.cnautotool.com\/blog\/wp-content\/uploads\/2025\/07\/MB-Star-C6-Multiplexer-Disconnects-and-Reconnects-During-Diagnostics-8.jpg\" alt=\"\" width=\"999\" height=\"562\" srcset=\"https:\/\/www.cnautotool.com\/blog\/wp-content\/uploads\/2025\/07\/MB-Star-C6-Multiplexer-Disconnects-and-Reconnects-During-Diagnostics-8.jpg 999w, https:\/\/www.cnautotool.com\/blog\/wp-content\/uploads\/2025\/07\/MB-Star-C6-Multiplexer-Disconnects-and-Reconnects-During-Diagnostics-8-300x169.jpg 300w, https:\/\/www.cnautotool.com\/blog\/wp-content\/uploads\/2025\/07\/MB-Star-C6-Multiplexer-Disconnects-and-Reconnects-During-Diagnostics-8-768x432.jpg 768w\" sizes=\"(max-width: 999px) 100vw, 999px\" \/><\/a><\/p>\n<hr data-start=\"1970\" data-end=\"1973\" \/>\n<p data-start=\"1975\" data-end=\"2055\"><strong data-start=\"1975\" data-end=\"1990\">Conclusion:<\/strong><br data-start=\"1990\" data-end=\"1993\" \/>If your <a href=\"https:\/\/www.cnautotool.com\/goods-6887-Mercedes-BENZ-C6-Xentry-diagnosis-VCI-DOIP-AUDIO-Pass-Thru-Multi-Diagnostic-Tool.html\">MB Star C6 multiplexer<\/a> disconnects during diagnostics:<\/p>\n<ul data-start=\"2056\" data-end=\"2315\">\n<li data-start=\"2056\" data-end=\"2112\">\n<p data-start=\"2058\" data-end=\"2112\">Verify WiFi signal strength and minimize interference.<\/p>\n<\/li>\n<li data-start=\"2113\" data-end=\"2152\">\n<p data-start=\"2115\" data-end=\"2152\">Place the device outside the vehicle.<\/p>\n<\/li>\n<li data-start=\"2153\" data-end=\"2243\">\n<p data-start=\"2155\" data-end=\"2243\">Ensure you\u2019re connected to the correct WiFi network (specific to your C6 serial number).<\/p>\n<\/li>\n<li data-start=\"2244\" data-end=\"2315\">\n<p data-start=\"2246\" data-end=\"2315\">Restarting the setup can also help re-establish proper communication.<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"2317\" data-end=\"2396\">If problems persist, consult with technical support for deeper troubleshooting.<\/p>\n<!-- AddThis Advanced Settings generic via filter on the_content --><!-- AddThis Share Buttons generic via filter on the_content -->","protected":false},"excerpt":{"rendered":"<p>Problem Overview: While performing vehicle diagnostics using the MB Star C6 multiplexer, the device intermittently disconnects and then reconnects on its own. This issue can prevent successful diagnostics and disrupt workflow. Issue 1: Unstable Connection During DiagnosticsObservation:During diagnostics, the MB&hellip; <a href=\"https:\/\/www.cnautotool.com\/blog\/how-to-fix-mb-star-c6-multiplexer-disconnecting-and-reconnecting-during-diagnostics\/\" class=\"more-link\">Continue Reading <span class=\"meta-nav\">&rarr;<\/span><\/a><!-- AddThis Advanced Settings generic via filter on get_the_excerpt --><!-- AddThis Share Buttons generic via filter on get_the_excerpt --><\/p>\n","protected":false},"author":1,"featured_media":16539,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[928,1423],"tags":[2606],"_links":{"self":[{"href":"https:\/\/www.cnautotool.com\/blog\/wp-json\/wp\/v2\/posts\/16537"}],"collection":[{"href":"https:\/\/www.cnautotool.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.cnautotool.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.cnautotool.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.cnautotool.com\/blog\/wp-json\/wp\/v2\/comments?post=16537"}],"version-history":[{"count":2,"href":"https:\/\/www.cnautotool.com\/blog\/wp-json\/wp\/v2\/posts\/16537\/revisions"}],"predecessor-version":[{"id":16547,"href":"https:\/\/www.cnautotool.com\/blog\/wp-json\/wp\/v2\/posts\/16537\/revisions\/16547"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.cnautotool.com\/blog\/wp-json\/wp\/v2\/media\/16539"}],"wp:attachment":[{"href":"https:\/\/www.cnautotool.com\/blog\/wp-json\/wp\/v2\/media?parent=16537"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.cnautotool.com\/blog\/wp-json\/wp\/v2\/categories?post=16537"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.cnautotool.com\/blog\/wp-json\/wp\/v2\/tags?post=16537"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}