Renewing the hydraulic system fluid every 2-3 years or 25K miles should extend the life of many of the hydraulic system components. This is not a part of Mercedes prescribed maintenance, so most cars are still running around with the original fluid (plus years of accumulated contaminants).
I did a flush/renew of my RST system fluid on 7-13-07. My car was seven years old with 30K miles. If you look at the attached pictures you will notice a color difference. The old MB fluid (left vial) looks like a beer color while the new Febi-Bilstein 02615 fluid (right vial) is clear. I also attached a picture of my hydraulic reservoir containing the old MB fluid.
I did a flush/renew of my RST system fluid on 7-13-07. My car was seven years old with 30K miles. If you look at the attached pictures you will notice a color difference. The old MB fluid (left vial) looks like a beer color while the new Febi-Bilstein 02615 fluid (right vial) is clear. I also attached a picture of my hydraulic reservoir containing the old MB fluid.
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