2005 Mercedes-Benz CL65 AMG Long-Term Road Test

  • Full Review
  • Pricing & Specs
  • Road Tests
  • Comparison
  • Long-Term (10)

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


  • bankerdanny bankerdanny Posts:

    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.

  • mercedesfan mercedesfan Posts:

    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.

  • kirkhilles_ kirkhilles_ Posts:

    Umm... okay. So, I went to the site and it says that it should use 0W-40W. So, what's the problem here? Mobil 1 OW-40w isn't exactly "special oil" as its what is in our 2013 Pilot (not exactly a rare car). Now, I will say that Mobile 1 lists it as a "European Car Formula" which IS special, but I would doubt that its required to use that anymore than its required to use "high mileage" or whatever variant.

  • This thing is a 602 horsepower hemorrhoid. I'd love to drive it or go for a ride though...

  • tjpark01 tjpark01 Posts:

    All that matters is that it meets the current MB 229.3/229.5 for gasoline engines in N. America. The 2 most common oils in N. America that can be found easily are Mobil 1 0W-40 and Castrol Edge 0W-40, both are labeled "European Formula" and both are sold at Walmart.

  • So far it seems that pretty much everything is a challenge with this car. A friend of mine was looking at an E350 and an E500, 2008 or so vintage, a couple of years ago at the MB dealer. I talked him into the E350 after reading some of what's on the net about the air suspension system. While I was at the dealer I was completely distracted by a 2005 or 6 Maserati Quattroporte, about 60K miles, asking mid-30s. I thought to myself, ten years ago I would have talked myself into this, consequence be darned. This AMG is one more example of the wisdom brought by age (and maybe a little experience)

  • reminder reminder Posts:

    I expect the most difficult challenge will be not going broke.

  • bassrockerx bassrockerx Posts:

    the MB does not use the "standard" mobil 1 oil it uses a special additive that Merc requires. i believe it has like Mtec or somehting like that on the bottle castrol also has an oil that is acceptable for Mercedes.

  • bankerdanny bankerdanny Posts:

    I'm sure you're right bass, but I personally think that is a scam by MB to get you to buy oil through them. I can't think of any reason why this engine, which is made of the same materials and uses the same basic technology as dozens of other engines should need some sort of super extra special synthetic.

  • okbeartoy okbeartoy Posts:

    Mobil 1 0W-40 is one of the the correct oils, at least make an attempt to check your facts before making blanket statements about a special additive. These oils are easily obtainable at WalMart and most any automotive retailer.

  • diigii diigii Posts:

    I still can't get over the fact that this is one of the most sophisticated, technologically advanced engine made by the Germans and yet is oil guzzler. Not good!

Leave a Comment

Research Models

Have a question? We're here to help!
Chat online with us
Email us at help@edmunds.com
*Available daily 8AM-5PM Pacific
Call us at 855-782-4711
Text us at ED411