E-Class (W212) 2010 - 2016: E 350, E 550
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M278 E550 4-Matic Owners, Sound Off!

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Old Sep 30, 2014 | 11:05 PM
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M278 E550 4-Matic Owners, Sound Off!

Hey everyone!

Coming from the W211 forum, just wondering who here is a current/past E550 bi-turbo owner, and how many of you have modded your car performance wise. Thinking the E550 bi-turbo is a logical next step from my 07 E550, and wanted to know overall impressions/reliability on the W212 with the M278.

Thanks.
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Old Oct 1, 2014 | 10:51 AM
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Mine needed O2 sensors at 32k but other than that, it has been a tank. I have owned from 6k to 40k so far. Only problem is that I am constantly debating with myself about getting a tune.
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Old Oct 1, 2014 | 06:10 PM
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Not a very reliable car, it has been back to the dealer many many times due to many issues, especially the brake issue.
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Old Oct 1, 2014 | 06:22 PM
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Good to hear GoBlando, what brake issue sharpxia? And who here on the W212 forums has a beastly E550 I could check out?
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Old Oct 1, 2014 | 06:35 PM
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11' E350, 12' E550
I have this weird sticky brake thing, but dealer couldn't find, it only happens when the disk is hot, normally after 30 min. local driving. And the disk wrap issue, you need to change the disk more often than any other MB I have owned. And a lot of other minor issues like the computer sensors' problems.
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Old Oct 1, 2014 | 07:22 PM
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Disks don't warp homie, except in very unique applications such as towing extreme loads or racing. "Warped" brake rotors are a misconception, meaning that most situations people refer to as warped rotors are actually uneven transfer of braking material to the surface of the rotor from the pad. A solution is to go through another bedding procedure or have the rotors resurfaced to take off this uneven material transfer.

A more permanent solution? Get new pads/braking compound. Go for Akebono or StopTech or something of the sort.
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Old Oct 1, 2014 | 08:20 PM
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I understand, but mine had problem at 5k miles and it was on normal new car driving, I usually don't push too hard on my new car on the fist few k-miles. Dealer did changed a new set of pad, and at 7k I can feel it again. If it doesn't last 5k of normal driving, I think it is the car's problem.
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Old Oct 1, 2014 | 10:09 PM
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Originally Posted by GoBlando
Mine needed O2 sensors at 32k but other than that, it has been a tank. I have owned from 6k to 40k so far. Only problem is that I am constantly debating with myself about getting a tune.
I feel that struggle too....I am at 10K and all is good thus far.
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Old Oct 1, 2014 | 10:13 PM
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Originally Posted by sharpxia
I understand, but mine had problem at 5k miles and it was on normal new car driving, I usually don't push too hard on my new car on the fist few k-miles. Dealer did changed a new set of pad, and at 7k I can feel it again. If it doesn't last 5k of normal driving, I think it is the car's problem.
Right but if they keep replacing it with the OEM pads you will probably have the same issue, try aftermarket pads.
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Old Oct 2, 2014 | 02:37 AM
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Originally Posted by AMGAffalterbach
Right but if they keep replacing it with the OEM pads you will probably have the same issue, try aftermarket pads.
Will you buy a new car and within warrantee you replace everything with aftermarket part? I don't think most Mercedes owners would NOT like to do that.
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Old Oct 2, 2014 | 11:05 AM
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Originally Posted by sharpxia
Will you buy a new car and within warrantee you replace everything with aftermarket part? I don't think most Mercedes owners would NOT like to do that.
Exactly...
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Old Oct 2, 2014 | 01:43 PM
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zimmerman rotors and Akebono pads are an excellent combination.
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Old Oct 2, 2014 | 02:03 PM
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Originally Posted by C250INLA
zimmerman rotors and Akebono pads are an excellent combination.
I know some aftermarket parts would work great, but here we are discussing the reliability of the car itself out the factory.
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Old Oct 2, 2014 | 02:05 PM
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2014 E63S; AMS 100 octane ECU dyno tune; EDOK TCU tune; BB intakes; sprintbooster
Originally Posted by sharpxia
I know some aftermarket parts would work great, but here we are discussing the reliability of the car itself out the factory.
Most owners should not have to and will not replace to aftermarket parts. Benz should build their oem parts better
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Old Oct 2, 2014 | 02:07 PM
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2014 E63S; AMS 100 octane ECU dyno tune; EDOK TCU tune; BB intakes; sprintbooster
Originally Posted by sharpxia
I have this weird sticky brake thing, but dealer couldn't find, it only happens when the disk is hot, normally after 30 min. local driving. And the disk wrap issue, you need to change the disk more often than any other MB I have owned. And a lot of other minor issues like the computer sensors' problems.
I had total distronic sensor failure within 4000 miles... Corroded harnesses
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Old Oct 2, 2014 | 02:40 PM
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So as per the second part of my question, are there any W212s (non-E63s) on this board that are making pretty big power? I assume at least a handful of people are tuned, and even fewer have downpipe/other mods but I'm sure they exist.
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Old Oct 3, 2014 | 06:21 PM
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Just popped on a CPO '12 E550 ... it goes like stink and I absolutely love it! The motor usually loafs along at 1.5K rpm's in 6th or 7th gear, which is just a few hundred rpm's shy of its max tq rating so power is still available even w/o downshifting.

From the seat of my pants, I think it's 85% the straighline perf of a '09-14 CTS-V that has 556hp and about that much torque. The Caddy can dance with its trick MR susp, but I'm afraid my non-air susp E550 can't.
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Old Oct 4, 2014 | 03:02 AM
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You should tune it! I can imagine, welcome to the forums btw...
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