I am doing the first oil change on my M103 ('88 300SEL) since I have owned it. I have put about 3200 miles on it since I bought it last October.

My car has around 157K miles and at this point, it dont leak or burn any oil, which is rare for a M103 from what I have read. Mine may have already had work done to it in the past however.

I am wanting to get some advice from M103 owners as to what weight/brand of oil would be best for this engine for hot weather. I went to the dealer the other day and bought a Mercedes oil filter, so thats been taken care of. I will look in the manual tomorrow to see how much oil it holds. I am thinking it said 6 or 7 quarts? I may be wrong... it may be more like 5 quarts. I will check it out.

I have not even looked at it, but I am hoping that the oil filter is easy to gain access to and that my standard filter removal will take it off easily.

Thanks for any advice.