Got a few questions regarding the 2012 - 2014 E350 4matics....








Personally I love the 4Matic. I’ve driven the car with absolute confidence in 10+ inches of snow without issue (except jamming up the lower lip with snow, but no biggie). I’ve also been in torrential tropical downpours in it with being in NC during hurricane season and did not flinch one bit with 80mph on I95 heading back to DC. It handles like nothing else I’ve owned.
love the pano roof. Yeah I heard the pop noise once, and only once in the 3 years and 30k miles that I’ve owned it.
Must have option? In my opinion - the upgraded LED lights! Best I’ve seen in a sedan. You can tell if the car has them by the daytime running lights. If they look like two air quotation marks in each lease, then it’s the LED. If it it’s just a row of bulbs along the bottom of the lense, then it’s not LED. I think they’re incredible, move with the steering, side marker lights on turns, insanely bright yet smart to not blind oncoming traffic, and has auto bright setting that works flawlessly.
Edit: E550 RWD (2010-2012)
M276. intake valve carbon build up, .spark plugs is a pain. Comlexity of high pressure fuel pump. All this for what? 20hp?
4matic..transfer case will start failing sooner or later. Engine mounts is a giant pita. Winter tires are much cheaper and easier.
The Best of Mercedes & AMG

Edit: E550 RWD (2010-2012)
M276. intake valve carbon build up, .spark plugs is a pain. Comlexity of high pressure fuel pump. All this for what? 20hp?
4matic..transfer case will start failing sooner or later. Engine mounts is a giant pita. Winter tires are much cheaper and easier.
Engine mount comment was in relational to 4matic. Much easier on RWD.
Tires would least for my concerns, but fair point if you put lots of miles.




Edit: E550 RWD (2010-2012)
M276. intake valve carbon build up, .spark plugs is a pain. Comlexity of high pressure fuel pump. All this for what? 20hp?
4matic..transfer case will start failing sooner or later. Engine mounts is a giant pita. Winter tires are much cheaper and easier.
The high pressure fuel pump, only thing that I don’t like about it is the ticking noise that comes from it. That’s a thing with nearly all manufacturers though these days. The low pressure on port injection is silent, which if I had to say, I wish was the same for the direct injection engines too.
I can’t comment on the spark plugs. But at the end of the day, it is a Mercedes after all. Not gonna get away completely from those those mystical repair bills entirely.
the engine mounts is indeed the booger between the two platforms. The 4Matic makes it more complicated to get them out, and there costs more. Anywhere from say $1,500 to $2k. And they do start go at around the 60k or 6 year mark. That’s the price for the AWD.
I've said this in a couple of other threads.. I've owned a 2 M272s and 2 M276s. The M276 is the superior engine, by a large margin. I always find it strange when people recommend against it. The M276 production numbers are huge, and aside from a few issues around the introduction, it has proven to be a very reliable engine used across the lineup from C to SLC to SL to GLE to S-class.
Yes, spark plugs suck, though. I'll be paying a specialist shop for that work.
Last edited by NYCGLK; Aug 26, 2020 at 12:28 PM.
I've said this in a couple of other threads.. I've owned a 2 M272s and 2 M276s. The M276 is the superior engine, by a large margin. I always find it strange when people recommend against it. The M276 production numbers are huge, and aside from a few issues around the introduction, it has proven to be a very reliable engine used across the lineup from C to SLC to SL to GLE to S-class.
Yes, spark plugs suck, though. I'll be paying a specialist shop for that work.


Right (passenger) side plugs are easy. Air filter housing needs removed.
Left (driver) side plugs are a bear. Middle and rear plugs are obstructed by the engine ECU bracket (after ECU removal) and PCV hose. The ECU bracket ideally should come out, but is not spelled out this way in WIS or other DIY documents. Also, the ECU bracket seems to be different for various vehicle installations (E-Class, GLE, etc.), and it was particularly offensive for me on the GLE. The GLE has taller fenders and higher ride height which makes reaching down to work on the plugs a bit harder than on sedans.
The valves you posted don't look great, no. But if the M276 were going to have widespread carbon related issues, 7 years is plenty of time for them to have surfaced. Our old N54-equipped BMW was experiencing the issue in the 40-50k mile range. That's not too say there won't be an isolated issue here or there, but it is not common. That was my point - at the number of M276s out there, if carbon was a crippling issue the way it was in BMW and Audi, it would be on every sub-forum on MBWorld.
I've owned both 272 and 276, and actually neither one ever caused me any issue whatsoever. That said, the M276 is the superior engine. At least equal, if not better, probable reliability while also having better drivability with more power and better fuel economy. Win/win.
Last edited by LILBENZ230; Aug 27, 2020 at 02:32 AM.
The high pressure fuel pump, only thing that I don’t like about it is the ticking noise that comes from it. That’s a thing with nearly all manufacturers though these days. The low pressure on port injection is silent, which if I had to say, I wish was the same for the direct injection engines too.
I can’t comment on the spark plugs. But at the end of the day, it is a Mercedes after all. Not gonna get away completely from those those mystical repair bills entirely.
the engine mounts is indeed the booger between the two platforms. The 4Matic makes it more complicated to get them out, and there costs more. Anywhere from say $1,500 to $2k. And they do start go at around the 60k or 6 year mark. That’s the price for the AWD.
Last edited by MBNUT1; Aug 27, 2020 at 03:28 AM.




