I know there has been problems with cam shafts failing on engines from 2004 to 2006. I have a 2007 CLK 350 Cab. When this car was relatively new the dealer changed the cam shaft sensor. Are they trying to hide a problem.
There are two potential problems with that engine. One is the "balance shaft" which is actually the main drive gear for the timing change that is forged onto the balance shaft. It's made from an alloy that is too soft and will stretch or wear away prematurely. The other problem are defective magnets on the camshaft positions sensors. If you'll post your VIN, we can check the engine serial number and then compare it to the affected ranges to see which of these problems you may or may not be exposed to.
WDBTK56F67F210575 has M272 engine #432027. That is within the range of engines with defective balance shafts (through #468993). That is also within the range of engines affected by defective camshaft solenoids (up to #759427). SO, it is very possible that the codes for the solenoids were present (DTCs 059, 0060, 0063, 0064, 0271, 0272, 0275, and 0276) DTCs 1200/1208 are symptoms of the balance shaft timing gear failure.
This car has 39,000 miles. There is no warranty. I will consider getting rid of it. This is my second Benz. My first was a 2000 E320. That car was built late in the year and was spared a fatal flaw that other E320's had, similar to this problems.
I really do not like German cars. This car is my wife's. I had 2 BMWs that were very disapointing.
Sorry to hear that you are disappointed with your CLK. MBZ's aren't for everyone. I know this balance shaft problem is quite an issue, and MBZ really should have recalled them. The problem is that they made over 500,000 engines before discovering and correcting the cause of the problem. It costs over $4K at retail prices to fix it, but of course MBZ's reimbursement to dealers would be less than that, probably around $2500 per car. Still, that's 1.25 BILLION dollars in repairs. And honestly, not all engines will have the problem. Some may go well over 100K with no problems, others, like mine will have issues at 30K miles.
I don't blame you for wanting to get rid of it. If I weren't so inclined as to be willing to fix the problem myself, and had I not gotten such a good price when I bought it, I'd feel the same way. I was lucky - mine failed out of warranty, but early enough that MBZ was willing to cover the repair. If yours were to fail today, they might cover it, but if it fails at 100K, they probably won't.
I just don't understand why they can't make a reliable car for $60,000. Problems with these cars are not minor problems. I just got the transmission serviced from a local independent Mercedes specialist. I totaly trust this guy. He said according to the book, the transmission should be serviced at 39,000 miles. However, there is no service schedule after that for the transmission. The reason he believes is that there have been failures for this transmission. Mercedes felt than changing the tranny fluid at 39,000 miles would remove metal fillings which may occur during the breakin period.
So now we are talking about a $60,000 car with engine and tranmission problems!
Well, consider the 722.6 transmission, which uses mostly the same parts and design as your 722.9, just with fewer gears. Those were supposedly "sealed for life". Some started failing around 100K miles, so now, unofficially, MBZ recommends fluid and filter changes on those now. I changed fluid in my 722.9 at 39K, and it was really bad - absolutely black and the magnets were twice their size, coated with "sludge". Now that I have the pump and fluid, filter and gaskets only cost around $100, I'll probably change it at every other oil service.
The reality is, these transmission failures are anecdotal - a very small percentage actually fail, just as they do on most all makes and models. It's just more dramatic when things fail on a $60K+ vs. a $20K Asian make.
There were many complaints about the 7GTRONIC transmission, but not many failures. Most complaints were about jerky shifts, odd shift patterns, and slippage. Most problems were solved by a TCU firmware reflash. Of course there were failures, and like I said, they were few. Think of it this way - people mostly come to forums like this to solve problems, so how many transmission failures do you see mentioned here? The same goes for the balance shaft failure. Now, there are a lot of reports of the cam shaft solenoid magnets, but those are easy and cheap to fix. Actual balance shaft/timing gear failures? I think counting me in my CLK550, I've only seen three or four others between this and the W209 forum mention having the problem.
That is one reason the class action lawsuit was thrown out of court - it was very poorly put together. The CLK350 Cabriolet would certainly have the possibility of having an M272 engine with a bad balance shaft. If you post the VIN, I can give you the serial number and tell you if it's in the range.
BenzWorld.org forum is one of the largest Mercedes-Benz owner websites offering the most comprehensive collection of Mercedes-Benz information anywhere in the world. The site includes MB Forums, News, Galleries, Publications, Classifieds, Events and much more!