2005 Mercedes-Benz CL65 AMG Long-Term Road Test

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2005 Mercedes-Benz CL65 AMG: Adding the Right Oil Is a Challenge

March 19, 2014

2005 Mercedes-Benz CL65 AMG

I was halfway into a 160-mile trip when I got a stern warning telling me to add 1 liter of oil to the 2005 Mercedes CL65 AMG. I knew that Mike Schmidt had added oil only 1,879 miles ago so I wasn't completely surprised. But checking the oil level and responding to this message wasn't easy.

There is no dipstick for this enormous power plant. Instead, you have to park it on level ground for five minutes and then check the oil via a special sensor. This time the display informed me that I needed to add 1.5 quarts, so the onboard computer converted from metric to the U.S. system.

Finding the right kind of oil was also an adventure and took me 15 minutes of gazing at racks of oil in an auto parts store and comparing the current oil descriptions to those in the owner's manual from nine years ago.

By the way, I came across this handy reference for choosing oil from Mobil.

With oil added, the stern warnings went away and I was able to begin enjoying the car rather than worrying about when the next problem would arise.

Philip Reed, Senior Consumer Advice Editor @ 60,924 miles

Most Recommended Comments

By mercedesfan
on 03/19/14
8:35 AM PST

You guys should really just keep a case of oil in the trunk. Check ANY owner forum and you will see that almost all of the early M275-equipped AMGs consume oil at the rate of about 1-quart every 1500 miles. You guys are going to be adding a lot of oil over the life of the vehicle.

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By bankerdanny
on 03/19/14
7:23 AM PST

More detail please. What kind of oil is required? Why won't any brand name synthetic in the right weight be sufficient? It just doesn't seem to me that much staring at oil choices should have been required.

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