My friend has a Freelander 1.8 petrol (2005) and it has developed an odd smell which tends to occur during motorway use. It smells like burning rubber or a "fishy smell". He says it seems to be after the underside was washed in an automatic car wash, but the smell has persisted for weeks now. I've had a look round and underneath but can't see anything. does anybody have any ideas as to what it could be?