When was the last time you changed the oil in the trans/torque converter? Condensation can look like a lot of water in oil. I recently bought my D6C and the oil was contaminated with water...color looked sorta like coffee with way too much milk in it, I dumped the oil, changed the filters put in fresh TO4 oil and it cleared up mostly....I have been using the machine since and what little that was left in the system has 'cooked off' and now the oil looks like new. This is all being said assuming that you don't know how long it has had water in the system, if it was clean one day and contaminated the next you have other problems. The odor you smell may just be the nature of the oil you have in the machine now, the oil in my machine has a sweetish smell to it when it get hot too.