Good day, Vehicle ML500 06 Horn, turn signal, windshield wiper & headlamps stopped working after driving through a flooded area for like 10mins, I've changed central gateway control module, rear sam, front sam & can bus yet the problem remained unresolved, also the radiator fan is blowing on high. Can anyone please suggest a way forward?

Something has water in it. either a light or something and it is shorting out the system. Never drive through high water. Too much can go wrong. Hopefully once it dries out it will work properly.

Many thanks, it's over 4 weeks now, expected it to have dried out completely. I'm getting someone to check the wiring for me.

Welcome. I would suggest you post your question in the forum section for your specific MB. The owners there own the same MB you own and will be more than glad to help you. You can find your specific section by scrolling down the main forum page.

Welcome! Please post a photo of the ML.