Join Date: Jun 2009
Location: Ocean Isle Beach, NC
Vehicle: 2003 SLK320 31,000 miles
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Oil analysis and two year change interval
Gordon and I have been having a discussion on the New Member forum about the above subject and I thought it would be best to move it here where it is more appropriate. Here is some background:
Originally Posted by sokoloff View Post
There is no mention of a one year time interval anywhere that I could find in the manual or any other Mercedes publications. I seem to recall some of our European friends saying that their interval is two years. There is no mention of what the time interval is in US publications that I could find. I will wait until the two year time frame is up since the last time I reset it (that's next month) to confirm. I have done a few oil analysis and the lab reports all come back with lots of life still left in the oil. In a two year period I'm lucky if I put 4000 miles on the car.
Sorry, I should have been more specific and mentioned the specific year. The OP has 2005 and that is what I am quoting. The 2005 and 2009 booklets state: Service Item 3 - 13,000 miles or 1 year Engine - Oil and filter change.
Checking the 2013 Service Booklet:
Service 3 - at every 13,000 miles or 1 year (Engines 271, 272, 276, 278) Engine - oil and filter change
In any case it is very interesting that your oil analysis' came back positive and I am wondering if you can post as I also drive about 4000 miles a year and may be needlessly changing the oil.
PS With more research I was able to find that for the R170 with ASSYST ie 1998 to 2004 the oil change interval seemed to be 2 years as it was part of A and B service but not a specific Service Item. In 2005 when FSS replaced ASSYST Oil and Filter change became a minimally yearly event.
I look forward to seeing your oil analysis.
2003 SLK320 40,000 miles - now lives in Tucson with my daughter
1959 220S Cabriolet - sold - now lives in Malta
1983 240D 351,000 miles original owner - sold
1999 E300D 215,000 miles
2014 Smart electric 17,000 miles
2014 Smart electric 9,000 miles