When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
I purchased my CPO 2012 4Matic in 2014 and have 167k miles on it. Until last year I had no major issues but since last January I’ve dealt with known problems. i’m close to tapping out on this thing and getting a Toyota but I’m not there yet. I’ve had these known problems:
- rusted rear subframe (replaced)
- oil in wiring harness (replaced harness and engine sensors)
- stereo head unit freezes and reboots (repaired)
- the wood trim is well faded. Unfortunately, I didn’t realize I could’ve claimed that under warranty until it was too late
- Comand control knob inop (replaced)
What else should I be expecting on my car repair horizon?
167K MILES? I think you'd be having trouble with any vehicle at that mileage, I'm not sure giving up on the Mercedes brand for Toyota is the only option.
I purchased my CPO 2012 4Matic in 2014 and have 167k miles on it. Until last year I had no major issues but since last January I’ve dealt with known problems. i’m close to tapping out on this thing and getting a Toyota but I’m not there yet. I’ve had these known problems:
- rusted rear subframe (replaced)
- oil in wiring harness (replaced harness and engine sensors)
- stereo head unit freezes and reboots (repaired)
- the wood trim is well faded. Unfortunately, I didn’t realize I could’ve claimed that under warranty until it was too late
- Comand control knob inop (replaced)
What else should I be expecting on my car repair horizon?
Mercedes builds vehicles to be predictable.
Everything you haven't seen is still ahead of you.
The list of all time favorites is not short...
> 4Matic oil maintenance + front wheel bearings repairs.
167K MILES? I think you'd be having trouble with any vehicle at that mileage, I'm not sure giving up on the Mercedes brand for Toyota is the only option.
I hear you, but I didn’t list all the repairs I’ve done. I understand high mileage means high maintenance. I listed “Mercedes” repairs. For example, most cars don’t have a problem with oil wicking thru the wiring harness nor does one typically have to replace the rear subframe. I forgot to mention the seat cushions that split every 75k.That my car never threw a check engine light until 165k speaks to the way vehicle was built and its maintenance. I was asking about what things peculiar to Mercedes may be on the horizon.
Engine and tranny mounts particular to Mercedes-Benz because I have not seen those need replacement in any American vehicle at all . No complaints just an observation . 167K miles is not to be sneezed at all . I don't want to bash a different car brand here but Mercedes-Benz cars are tough shell to me .If I were you , I would stick to Mercedes-Benz . Toyota maintenance could be cheaper but let's not forget Mercedes-Benz is premium car brand and everything in that world is premium maintenance wise
If my car done 167K miles in my country.... the engine will be removed and torn down for sure to be rebuilt earlier than 167K miles.
167,000 miles x 1.61 = 267,000 KM rounded
267,000 divided by 21 KM/H average = 12,700 hours running + idling if in my city. In USA probably 1/3 of that running hours at that mileage, meaning average speed is 63KM/H or 39 MPH.
267,000 KM divided 7 KM per liter = 38,142 liters fuel burned or US gallon 10,090 for me.
8,000 hours running hours is as far as I would go, before complete tear down. Assuming the engine and its fuel injection system can survive that much running hours.
Plastics & hoses exposure to heat as its life limit is based on hours.
MB coolant hoses are really good...I am impressed.
Plastic parts so far are decent for some parts handling coolant...as long as it is not for the turbos.
If my car done 167K miles in my country.... the engine will be removed and torn down for sure to be rebuilt earlier than 167K miles.
167,000 miles x 1.61 = 267,000 KM rounded
267,000 divided by 21 KM/H average = 12,700 hours running + idling if in my city. In USA probably 1/3 of that running hours at that mileage, meaning average speed is 63KM/H or 39 MPH.
267,000 KM divided 7 KM per liter = 38,142 liters fuel burned or US gallon 10,090 for me.
8,000 hours running hours is as far as I would go, before complete tear down. Assuming the engine and its fuel injection system can survive that much running hours.
Plastics & hoses exposure to heat as its life limit is based on hours.
MB coolant hoses are really good...I am impressed.
Plastic parts so far are decent for some parts handling coolant...as long as it is not for the turbos.
Surya:
How does your Turbo cooling works ? electric pump into a separate radiator ?
If you decide to try good piston spraying oil, your engine Temps will be under control.
Today I was pleasantly surprised: I noticed my A/C was cool and temps matched the display.
Last edited by CaliBenzDriver; Jun 2, 2024 at 04:02 AM.
12V electric pump is for aftercooler ( charged air cooler ) coolant only and stand alone cooling system with its own radiator and coolant reservoir.
The turbos coolant is tagging along main engine coolant system and engine oil system.
I am still waiting for the 1 of engine oil spray nozzle I ordered, have not arrived yet.
I want to test how many PSI does it actually open, it has some sort of ball + spring inside it.
For the time being piston underside oil spray and its relation to engine oil temperature and coolant temperature needs more testing/investigation.
The engine oil cooler gets what I call early coolant flow, the not so hot one.
The coolant sensor by position gets the hot coolant which has done its work and on the way back to mechanical coolant pump suction side.
So engine oil in theory would not be as hot as coolant, as coolant is cooling the engine hot oil or we can say that the coolant is being heated up by hot engine oil.
I am used to oil cooler being air cooled ( older engine ) or seawater cooled if for my marine diesel, but never yet like now, cooled by a coolant already hot from engine combustion.
I understand MB also wants the oil to warm up faster too, more so in cold countries.
My last test showed that if the thermostat open maximum, and radiator fan speed is high enough the coolant into engine block after being cooled by radiator
while car is stationary, I seen a cool 64C from coolant of 98C coolant temp . If car is moving 40MPH or faster, it will be cooler I am sure but my test rig is not designed to be used for moving car.
Unlike M271.8 engine, which actually has oil temperature thermostat ( regulator ),
I think our M276 generally will have cooler engine oil temperature because there is no such thermostat.
What I am saying is, hotter oil temperature on my M276.8 might not mean only that the piston oil spray is doing its job well, not as simple as that.
For my turbocharged engine, it is even more confusing, the aggressive driving will result in more often higher turbo boost occurring and the oil will be heated up more too.
Its been bugging me this question because I really want to know, how much of the extra heat to the oil is actually from piston oil spray alone.
If my car done 167K miles in my country.... the engine will be removed and torn down for sure to be rebuilt earlier than 167K miles.
167,000 miles x 1.61 = 267,000 KM rounded
267,000 divided by 21 KM/H average = 12,700 hours running + idling if in my city. In USA probably 1/3 of that running hours at that mileage, meaning average speed is 63KM/H or 39 MPH.
267,000 KM divided 7 KM per liter = 38,142 liters fuel burned or US gallon 10,090 for me.
8,000 hours running hours is as far as I would go, before complete tear down. Assuming the engine and its fuel injection system can survive that much running hours.
Plastics & hoses exposure to heat as its life limit is based on hours.
MB coolant hoses are really good...I am impressed.
Plastic parts so far are decent for some parts handling coolant...as long as it is not for the turbos.
My 2014 cummins is at 188k miles+ right now, average 43mph with about 4300hrs on the clock. Spent just shy of $33k US on fuel so far of course most of that was before this last administration which is killing us. Was gonna see how far it could go but picked up the benz so its my commuter car now, 41mpg (US) is much better than 19mpg lol.
Wondering if my baby diesel in the benz could make it to 400k miles. With my current commute and retirement date thats what I would be at. Pretty sure rest of the car wont but will see what happens. Like ya said all the plastic and rubber parts will go, not to mention on our rides the subframes rust out as well.
Funny fact at 20knts the ships I work with could travel for 10.5hrs with the amount of fuel Ive burned in my truck for the past 10 years (20yrs for my benz equivalent).
All things considered during my ongoing 8yrs of ownership, my M278-powered W212 has been very good (replacing leaky turbo coolant lines, addressing weepy front diff and replacing the Command knob). And once I left the dealer for an independent shop, the servicing costs became more palatable.
Originally Posted by Quint22
Spent just shy of $33k US on fuel so far of course most of that was before this last administration which is killing us.
Would you mind sharing what the last administration did that’s killing us? Thx
Keeping politics out of the thread....the cost of fuel and TCO of any car today is about 90% more than a few short years ago....I guess we are supposed to get an EV but dont plug them in as the grid can not handle it...we just drove through GA (trying hard to NOT SPEND A DIME in the state)...and had to purchase fuel for a total 22cyl and five turbos....yeah, I got raped. (GLS, E63, S3500)
I bought a 2012 E350 2wD CPO in 2014 with 18K miles on it. A couple months ago, I totaled it after hydroplaning and hitting a tractor trailer. I had a few scratches, but otherwise was fine. Car had 170,011 miles on the clock and never an issue. I did regular oil changes myself and brought it in for for the major service intervals. I planned on keeping it at least another 5 years if I hadn't wrecked it. Best car I ever owned. Decided I want another E so I ordered a 2025 E450. I hope to have it at least 15 years.
PS: Sorry for the duplicate post. I posted this in the wrong thread before and didn't see a way to move it.
My 2014 cummins is at 188k miles+ right now, average 43mph with about 4300hrs on the clock. Spent just shy of $33k US on fuel so far of course most of that was before this last administration which is killing us. Was gonna see how far it could go but picked up the benz so its my commuter car now, 41mpg (US) is much better than 19mpg lol.
Wondering if my baby diesel in the benz could make it to 400k miles. With my current commute and retirement date thats what I would be at. Pretty sure rest of the car wont but will see what happens. Like ya said all the plastic and rubber parts will go, not to mention on our rides the subframes rust out as well.
Funny fact at 20knts the ships I work with could travel for 10.5hrs with the amount of fuel Ive burned in my truck for the past 10 years (20yrs for my benz equivalent).
For fun sake, I calculated your ship engine horsepower, rough calculation.
Your Cummins truck at 188,000 miles @19 MPG = 9,895 US gallons burned and divided by 10.5 hours = 942 US GPH
Your ship engine/s is/are approx 16,000 KW or 21,500 HP total power.
I envy the average speed US vehicles get on the roads.....
US vehicles engine mileage life not as tortured as mine.
My E400 is a 16.4 US MPG average city bumper-2-bumper traffic and crowded highway combo...plus... the way I drive.
For fun sake, I calculated your ship engine horsepower, rough calculation.
Your Cummins truck at 188,000 miles @19 MPG = 9,895 US gallons burned and divided by 10.5 hours = 942 US GPH
Your ship engine/s is/are approx 16,000 KW or 21,500 HP total power.
I envy the average speed US vehicles get on the roads.....
US vehicles engine mileage life not as tortured as mine.
My E400 is a 16.4 US MPG average city bumper-2-bumper traffic and crowded highway combo...plus... the way I drive.
Yeah I hate to think of my truck in stop and go traffic, the mpg decreases dramatically. My om651 although drops alot is still respectable.
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Slideshow: A one-of-one U.S.-spec Mercedes-Benz SLR McLaren Roadster became even rarer after a factory-backed transformation at McLaren's headquarters.
