Hi all - I have a 1990 300E (24 valve) 100k - it has been fine with up to date servicing etc. The other day I was on the motorway - doing about 80mph (had already travelled some 40 miles) - looked in the rear view mirror and I saw faint whiffs of smoke apparently coming from the exhaust. I pulled over and opened the bonnet and there was some smoke coming from behind the rather large lumpy thing in the middle (think it's called an engine). After a minute or so, it stopped - I went around the back of the car and looked at the exhaust - it did look a little bit oily and there was a thin film of oil over the back of the car. I also checked the oil level - it appeared to be fine I conferred with my passenger (also not a car expert) and we decided to carry on - keeping the speed down - keeping an eye out for any more smoke (I should say that the oil pressure gauge goes to 3 and stays there when driving - so no problems there!). I drove for another 150 miles that day with no sign of smoke - gradually speeding up to normal motorway speeds. I have driven it to work for the last few days (20 miles each way) with no problems either.
My question is - does anyone know what might have caused this temporary smoking and should I panic and call my (non-specialist) mechanic?
many thanks Andy