Last post on Jun 26, 2013 at 1:21 PM
You are in the Mercedes-Benz C-Class
What is this discussion about?
Mercedes-Benz C-Class, Coupe, Hatchback, Sedan
#237 of 306 Re: fuel [lewis3]
Nov 25, 2008 (8:58 am)
We used regular .... yes ..regular for 4 years in our E and for almost a year (since 12/22/2007) ...regular in our 2008 C-300 Lux. No problems of any kind.
When we went some years ago (from Florida) to North Carolina, we experimented first with regular (and when the tank was almost empty), we put midgrade. Then we filled up with premium. We didn't notice any difference. Again....WE didn't notice any difference but perhaps an expert driver would. We are old folks and never drive faster than the speed limit. Perhaps climbing a steep hill would make a difference. We climbed those too and didn't notice any difference..... it is true, we don't hear as good as we used to.
Our service people never asked us about the gas we use so we think that their 'smart analyzer' at the service department could not tell the difference and the plugs and all the stuff works. .....by the way, our E was flawless for more than 4 years and the C had no mechanical problems ... except little comfort annoyances that have nothing to do with the operation of the engine.
From time to time, people post this question in the forum and there are many people for and against .... and they have their own reasons.
Mercedes exports cars all over the world. I wonder if all these foreign driver have access to premium or midgrade gas.
#238 of 306 Re: fuel [be325]
Nov 25, 2008 (11:04 am)
I have a C300 for a about 6 months. I have used all three grades and have noticed very little difference. When I do the math on the $$/mile it cost me, the more expensive the gas gets, ($3.50+ / gal) the more premium is worth the extra cost. But with gas prices down to $1.49 in Indianapolis, I am going with regular. The miles per gallon difference in my C300 is not significant enough to pay for premium. The manufacture "recommends" premium. I had a heart to heart talk with an old timer who buys gas for Sam's Club and he told me that most of the dealers in my area get their gas from the same location. He stated that Shell, BP, and Sam's gas were the same delivered to the pumps. Not sure what to believe about this, but I did fill up on Sam's Premium and found no difference. Regardless of the car, (unless it is high performance) it should have a robust fuel system to handle about anything sold today.
#239 of 306 Re: folding mirrors [papadoc33]
Nov 25, 2008 (11:07 am)
I have a C300 and as the weather gets colder my mirrors are getting "cranky" like me and making the same noise you are describing... I'm wondering what will happen when it really starts to get cold. I planned on talking to the dealer about it on my next visit considering it sounds so bad like it is going to break.
#240 of 306 Re: C300 instrument cluster- temp. gauge noise [avatar1]
Nov 25, 2008 (7:09 pm)
after multiple times of taking it the dealer, I decided to go to another dealership and they fixed the problem right away. something was wrong with my auxillary hose.
#241 of 306 Re: fuel [lewis3]
Nov 25, 2008 (7:22 pm)
I have been advised to not do it. I don't plan on keeping the car forever so I don't want the person who gets it after me to not have any problems that could arise due to this. I'd rather be proactive and use premium than pay for any expensive repair because I was too cheap to pay an extra 50 cents or so for gas.
I have told nothing major will happen if you do not drive your car hard. The car is made somewhat fool proof. I don't know if this could affect your warranty if you still have it.
If you do, it will automatically turn the timing on the engine down. You won't get full power.
I wouldn't advise it. If you paid that much for a Mercedes, you might as well take the best care for it.
Random things happen to me, especially with technology things so I won't take a chance on my new baby.
#242 of 306 Re: Mercedes C300 DVD Safely While Driving.... [carabel]
Dec 08, 2008 (8:37 am)
Were you ever able to circumvent the C300's DVD system?. Just purchased a 2009 C350 and would like to do the same. Any advice would be appreciated.
#243 of 306 Re: fuel [lewis3]
Dec 25, 2008 (6:38 pm)
In reviewing the owner's manual for my 2006 C280 I found that it requires 91 octane gas. Most U.S. premium fuel is 93 octane, therefore I time my refills to use about 1/3 regular (87 octane) and 2/3 premium (93 octane) gas to stay above 91 octane per tank. I get 19 mpg city and 33 mpg highway at no more than 5mph over the speed limit. This car is a dream on wheels.
#244 of 306 Re: fuel [tunisjs]
Dec 25, 2008 (9:31 pm)
Great idea on the mixing of gas. My wife has a c280 4 matic and does something similar. With gas prices at their current level she makes sure she buys a good brand and 87 octane most of the time.
#245 of 306 All-time oil change question.
Jan 09, 2009 (9:39 am)
Our 2008 C300 Lux is 13 months old and has 5300 miles.
I see a message about service ....and I believe ..it is time to put a new batch of synthetic oil and new filter.
The fact is that the car has been running flawlesly all this time ... yes on regular gas since we bought it ...and I see no need to take time, spend money.. because I think is not necessary at this point.
Synthetic oil in my car should last 10,000 miles according to the manual.... and I know people who change oil at 15,000 becouse that is how much they drive in 10 months. I am sure there 2 schools (1) change oil often (3k) as it is a good for the engine; (2) go by the milleage.
Who came up with that magic number of changing every 12 months ..no matter how much you drive?
#246 of 306 Re: All-time oil change question. [be325]
Jan 10, 2009 (6:55 am)
Well, you're stuck:
-If you want to keep the warranty in effect, you need to get the oil changed now....period.
-In the "olden days", e.g. through about the 2005 model year, MB used the FSS computer [Flexible Service System] in the US market [ and still does in many other areas of the world ]. Under the FSS, you could go 24 mos or about 10-16k miles, depending on usage - number of cold starts, avg speed, coolant temps, etc. These factors were calculated by the onboard computer, and decided when to get the oil changed. Many car makers use a similar system. Our 2002 C-class generally went 18-24 mos. and 12-14k miles under the FSS.
MBUSA opted to discontinue the FSS and go back to fixed service intervals, claiming customers were "confused" by the FSS. Magically, at the same time, they also stopped paying for all service during the warranty period [BMW still does, VW has a 3-year program, Volvo stopped and will apparently now start their prgm again. Audi dropped their paid svc pgm.].
Translation: dealers complained they weren't getting to see the customer enough in the service dept....so now you show up for an oil change once a year, whether you need it or not. This is about dealer revenue, not about the health of the engine.
In our case, 1 year for our '08 C300 Lux coincided with about 8500 miles - doesn't matter - get the oil and filter changed and the service book updated, or you run the risk of having the warranty voided.