Hi exclusive, is the soft top switch blinking slow or fast?
Ok, let me look at some sequence charts and schematics. I'm a little busy at work right now. I'll reply asap.
Good morning exclusive, I'm sorry to say but I'm suffering from a lack of information on this one. I thought I could pull up a sequence chart on the top operation but there's nothing in the Mercedes WIS. There apparently is a separate CD documenting the operation sequence (which I've ordered). I don't have any first hand knowledge on this one so I'm going to opt out and let some of the other experts have a look at the question. Perhaps they've seen the exact symptoms. Obviously the controller is not seeing one of the switches early in the sequence. If I discover anything I'll post an answer later.
Hi Hugh, I received a PM from my friend Paul in the UK on this. I've attached what he suggested. Let me know how you make out.
Have seen a couple of issues with the relay attached to the roof pump - it sounds like the relay is being energised if that is what he is hearing, but may not be outputting the feed to the pump.
As a simple test I would ask him to swap out the relay first to see if this is indeed the cause - they tend to burn the contacts out.
Best regards, Paul