I have a oil leak in my 1985 380sl ( it has 120,000 miles). When I started it up today I noticed that my oil gage needle kept going between 2 1/2 & 1 1/2...It has always stayed right on 3 before. I know that it is a little low on oil, but could being low, make the oil gage needle bounce back & fourth like that...Also, when you have an oil leak, whre is the most likely area it is coming from? Thanks!