try www.electrolux.co.uk  customer service and 
in manuals search box, put in the model number.
I tried it and although it doesn't show the manual it gives oportunity to send electrolux a message. 
You might be lucky. 
Info on built-in-toilet
 www.thetford-europe.com on here you can download free pdf repair instructions for Thetford toilets, if yours is one. model num required or look through models to find yours then follow to free repair instruction pdf's. Download and save to computer then  print out keep in c/van
if its c2 bench type electric flush post reply to your question stating  YES OR NO.    I have compiled instructions for pump and microswitch repair/replace.
Carver water heater ensure water runs free from hot tap before turning on heater. the flow from tap ensures boiler is full of water. And according to year some were fitted with dual method of heating, gas standard and main immersion so saves using the gas when hooked up to mains.
Fresh water pump and toilet pump both submersable,don't run them dry. if you're ever testing  one ensure its in water even a bucket.
                
 Bob
                
 April 2012