Problem Description and Possible Solution
The engine oil coolers may leak; Our technicians tell us removal of the cylinder heads is required to correct this leak.
Average mileage: 76,712 (55,000–118,000)
12 people reported this problem
I have had this issue for approx 15k mikes now and is not severe enough that I it is cause for major concern! However, the dealership at one point did a good faith repair, I believe because they did never replace a service bulletin part that lead to this issue! Leak is too slow for me to justify spending 3500-5500 to fix it. Love this car like everyone else when it is mechanically sound.
Had engine heads removed as this a design flaw.It is a simple gasket that breaks mercedes will not sell you the gasket but rather sell you a whole new intercooler.The new design not supposed to crack again. Expect to pay 600 for intercooler part. too bad thats not all. The labor will set you back stealership 7 days 8hours a day job.
If you dont have a mechanic this will set you back 8k-10k. No wonder resale is horrible on these cars.When there running there awesome. When.
This is a very common problem on the CL 600s '01, '02 and I suspect later models too. It is a $9000 repair. So put on your big boy pants. Mine has had the issue for a few years now, and my Mercedes service manager has told me to simply drive the car and not worry about it...unless I'm seeing oil in the garage floor. Which I don't. My main concern is having the car leave me, which my mechanic assures me it won't do...but of course if the oil cooler leak becomes worse, it will have to be fixed. I'm told the oil cooler leak is typically a slow leak. And to repair is a lengthy and costly repair given where they seals are on the engine. Under everything else! I bought the car new and truly love it. It is still brand new. Smells new. I hate to have to get rid of it over repairs. It's paid for. I was hopeful I would enjoy the car for many years given my low mileage. I hate the thought of putting $9000 into a repair that is now half the value of the car. But what's the cost of going out and buying something new to sit in the garage and lose even more money?...now where are those pants?