Is there an oil res on the side of the rad, should have two pipes screwed on there if its a diesel,now i think they are somthing to do with the tansfer box,i could be wrong,but im betting its either not there or its got no oil,oh i have just noticed you have a 200 i have a 300 so it could well be different,in front of the rad is the one for my auto box,so i reckon its transfer box cooling off the top of my head.please correct me if im wrong just thought to myself it could be PAS fluid cooling,now im confused,im going to look it up i will be back in a bit