Rear wash wipe fixed

[kg9]

You may recall my previous posts on this subject.
After checking relays fuses connections and voltage. Changing the pump, changing the dashboard switch the culprit was the SAM unit circuit board( situated and attached under the fuse box

A small connection had suffered some water damage so I append Isopropol Alcohol, and old toothbrush and hey ho
rear jets worked again
A bit if a faff removing the SAM . Incidentally Mercedes quoted £514.16 for a new SAM without coding
Hope this helps other members

 

[MSG2004]

Thank you. I'm sure this will help others as you stated as people Google stuff and read current/old posts, and we are none the wiser.
I've read many posts over the years where I'm not a member - It's good to have an update/solution.