after being a prior detailing business owner for over 10 years, perhaps i can assist...

i use 3 items to keep the new car leather scent... (many state, the car smells brand new)... use one item at a time.

1 - automagic leather conditioner... (true leather scent, very low sheen, non sticky and easy to use).

http://www.automagic.biz/specialt.htm (scroll down to no. 58)

2 - yankee candle 'leather' scented air freshener... (i place this under my seat slightly opened).

http://www.yankeecandle.com/cgi-bin/...sp?oid=4889141

3 - automobile 'leather essence' 2 fl oz spray... (can't seem to locate supplier - qdi inc).