Hi I need to replace the water pump on our 2010 Mercedes Viano Marco Polo.I've just bought one from Germany which is supposed to be compatible but it doesn't fit. I see that there's a Whale Pump offered in the shop. Does anyone have any experience of replacing a pump on an older Marco Polo and can they point me at the correct model? Any help much appreciated as I need to find a solution quickly 
. Thanks Sue
. Thanks Sue