Thought I had submitted this already but can't find any replies so must have done something wrong! Have a R129 SL350 and when I switch off engine after a run it makes a wheezy whistling noise for about three seconds every 30 seconds or so but with increasing time lapse as engine cools down. It seems to come from the nearside front part of the engine but even with head under the bonnet can't detect where or what it is. car has only done just over 3000 miles. Has anyone any ideas please?
