The camshaft adjuster solenoid (which is related to the variable valve timing system) may fail or timing chain/balance shaft components may wear, resulting in illumination of the Check Engine Light and various drivability issues. Mercedes-Benz has released a service bulletin outlining specific repair instructions depending on fault codes stored.
Check Engine Light Due to Faulty Camshaft Adjuster Solenoid on Mercedes-Benz ML350
Average mileage: 80,716 (9,948–184,000)
129 people reported this problem
79 people shared problem details
2006 Mercedes-Benz ML35063,000Visitor
Check Engine Light stays on. First I was told the camshaft adjuster solenoids needed to be replaced - I had all 4 replaced. The Check Engine Light came back on the next time I used the vehicle. Now I'm being told the balance shaft gears are wearing and the balance shaft needs to be replaced - estimate is $5,500. Mercedes is aware of the issues but has not issued a recall. From things I've read on the internet, a national class action complaint is being prepared - let's hope the courts can force Mercedes to "do the right thing".
I was informed by Mercedes service that my virtually new vehicle has a camshaft problem such that the camshaft has to be replaced for no less than $6,600. This sounds like an endemic problem in these models necessitating a recall by Mercedes. Please let me know if anyone else is experiencing this problem with their vehicle. Best Regards, Michelle T. Harrington
The Check Engine light comes on randomly and I'm tired of having it checked. The ML350 transmission is a piece of crap and I've neer been so disappointed in a vehicle in all my life (BMW, Nissan, Isuzu, GMC, Mitsubishi, Mercedes). Mercedes should be ashamed of themselves - this car should have been recalled years ago. I refuse to put one more penny into this poorly designed transmission. If anyone has this problem (and I'm sure there will be several) threaten to write a letter to the regional manager and that should get you somewhere. Once I'd did that my $2000+ bill disappeared magically. With that said, they know this is a systematic problem and worse yet, only Mercedes is "authorized" to fix the problem.
2006 Mercedes-Benz ML35067,000Visitor
Check engine light at 66K miles, transmission shifting hesitation in 1st and 2nd gears, failed electronic test for emissions at DMV with "Camshaft is out of alignment with crankshaft." Mercedes confirmed and gave an estimate of $5000. I asked them if they could cover it under the 60K mile warranty and they came back and said they'd cover 2/3rds of it. I then contacted them with information from this site and mentioned a class action suit from New Jersey, and this time they came back and said they would cover it under warranty. The camshaft had only 2 teeth remaining on the sprocket at the time of repair. As they were fixing this issue they also encountered broken seals and worn parts in the automatic transmission (also estimated as $5000 to repair.) Since the camshaft was covered, they decided to cover the transmission repairs as well. Appreciate the fact that they covered the repairs (the parts were called 'faulty' by the service tech), but it required much negotiation on my part, with them first trying to get me to pay for the whole thing, but eventually they gave in when they realized I knew they were trying to get me to pay for repairs to faulty parts.
2008 Mercedes-Benz ML35051,000Visitor
$250 later.... Check engine light came one and I was told a sensor in the camshaft had gone bad. If this is an issue, why aren't they covering these issues?
2006 Mercedes-Benz ML35084,000Visitor
P0016 an P0017 error codes.
2007 Mercedes-Benz ML35094,000Visitor
CEL while traveling out of state with young son. Went to the local MB dealership, always serviced at our home state MB dealership and had copy of all service records in car. I was told that the repair would be $5800! Zero offer of MB assisting with cost of this known problem (unknown to consumer at time of purchase) This was our first and last MB. Thankfully I was visiting my home state and was able to trade it in (at a wholesale price) on a new(non MB) vehicle. We will NEVER buy another MB and 3 of my family members just sold or traded in their MB for another brand. We are just thankful we were not hurt. Cant imagine that MB could know about problems with the balance wheel, crankshaft and not feel the need to inform their customers. Never once while having our vehicle serviced at a MB dealership was this mentioned.
2006 Mercedes-Benz ML350125,211Visitor
Check Engine light on for 3 months, Have been told by 2 different MB shops that problem is Counter Shaft Gear Wear (Known Problem) and the Other Shop says it needs an intake manifold. Both Repairs in the Thousands of dollars.
2007 Mercedes-Benz ML35078,000Visitor
Check engine light comes on and when check indicates cam sensor problem. I was told that Mercedes knows about this problem and has a silent recall on this. When I checked with them one dealer indicated it knew nothing about it and another did. The one that did wanted receipts showing regular oil changes which I did most of the time by myself and could not produce. Now an estimate to repair on my own is close to $5000.
fault codes 1200 1208 Check engine light balance shaft worn, timing chain stretched engine pulled, separated from transmission, disassembled, r and r: timing case, lower panels, upper oil pan, lower oil pan, replace cam magnets, replace timing chain, reassemble, about a week at the Mercedes dealer, thousands of dollars..... .
Check engine light came on at 70356miles. Was told thermostat camshaft adjuster magnet and oring need to be replaced. Engine was running colder than it needed... maybe the camshaft was stuck open. Cost $550. I am tired of this ML 350 and will be looking to unload it very soon.
2006 Mercedes-Benz ML35071,000Visitor
Not Fixed yet. Check Engine came on. Throwing p0016 and p0017 errors. Also the car is randomly shutting down with a noise coming from the front end and the ABS failure lights coming on. After restart the car works ok.
2006 Mercedes-Benz ML35078,000Visitor
Had the check engine light. The dealer fixed the faulty cam position. Two months later, same problem. MB must recall these cars.
2007 Mercedes-Benz ML35070,000Visitor
2 of the 4 solenoids were bad, took to dealer as soon as light came one, repair just under $400 to replace solenoids, parts $39 x2 and labor was the rest, all at the dealer
2006 Mercedes-Benz ML35080,000Visitor
Engine light on, Cam shaft sensor, burns oil, lost power and started "missing" - comes and goes.
I bought this car used. Check Engine Light came on the next day. Repositioned the gas cap after filling. Light went off temporarily. Went back to dealership with car and the replaced the solenoid at their expense. A couple of days later CEL came on again, then went off by itself the next day. However, now the car mysteriously slips in the driving gear the engine revs and the car loses power to the point that I am just coasting. I have to turn the car off and back on and then Drive works correctly. This is the third time in 4 days this has happened. I am going to try and take it back to dealership and replace it with another car. I cannot afford for this to continue to happen. BOOOOO! to Mercedes for not issuing a formal recall. And double-boo for whatever CARFAX the dealership uses not pointing it out to them before I purchased the car!! I will report the outcome with the dealership so that everyone will know whether it is reputable or one you need to run away from.
2006 Mercedes-Benz ML35066,000Visitor
Hi,I have same problem with mine 2006 ML350,check engine was on for a couple months and car was running fine until it was time for emission ,checked codes on the car and p0016,p,0017 took to local MB service and estimate for repair over 6K,besides this car got more issues ,since we bought it used 2years ago car had always knocking noise in the steering,not long ago light started to come on for low oil, car also wile driving unlocks and locks by it self,driver seat(leather)started to crack!So disappointed with this car"mercedes" name should be quality! My friend that drive cheaper cars don't have this issues,not even close!
2008 Mercedes-Benz ML35099,000Visitor
Faulty exhaust and intake camshaft solenoid magnets. Check engine light comes on and then a call from your repair shop with a quote for $550 for two. Already had two replaced when vehicle had only 15K miles on it. MB must know or have known there is a problem here.
2008 Mercedes-Benz ML35082,000Visitor
My check engine light would go on and off for years, particularly when there was a sudden change in the outdoor temperature between seasons. Unfortunately, every time I brought my car in for service, the check engine light was not on, so I was told not to worry, bring it back when the light was on. Finally, even though the check engine light was off, well after my warranty expired, it was discovered the camshaft sensors were faulty. Cost of repair $1,507.06.
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