I just got a 1981 380 SL with 125,000 miles on it. I've never owned a Mercedes Benz before. I want to change the oil and need some advice. I've always done my own oil changes on Chrysler products. Do I need any special tools for the 380SL oil change? Where's the oil pan plug? What about the filter? Is it a special oil filter or does fram make them? Do they screw off with an oil filter wrench like an American car? What about the oil? I've always used Pennzoil on my American cars. It looks like the manual recommends 20W-50. Can anyone recommend a good service manual? I want to make sure I do it right. Any help is appreciated.