wheelew

Ok, I just took my AMG C32 back to the dealer for the 2nd time. First time I took it in told them it is using alot of oil, they checked it out said no problem found. We need to change the oil in the car and measure the useage. cost $115 I have driven the care about 340 miles since the oil change and the car is asking for another quart of oil. At this point the car is back at the dealer waiting to look at it for a 2nd time.

I am very suprised to have this issue with a car that only has 52K miles on it. Oh, at about 50K the driver side CAT blew out.

acr2001

Sounds like the CAT went because all that oil you're burning fouled it up. The other one is likely to go soon.

E55AMGZ

i just bought my 05 c230 kompressor last week and had this message to add 1.0qrt at the next gas station. My car only has 34k miles. I added 1.0qrt checked it and its fine so far havent gotten that message yet so i hope its not anything bad.

Twenty4Play

When's your next service?

Mine did the same thing, about 800 miles prior to its next scheduled service.

If it had just been serviced, then:
A) They didn't put enough oil in it.
B) It does have a leak and/or is burning a lot of oil.
C) They didn't really do the service.

If you're close to your next service, don't worry about it unless the problem persists after getting the service done.

jokerswld34

my o5 was burning oil between service intervals almost from the time i purchased it new in 2005. i would have to add a qt about 3/4 of the way through the service interval. but, i switched oils from mobil 1 0w-40 to Royal Purple 5w-30 and have never had to add any oil since the switch. I also cut my oil changes in half and now change every 5000 miles to insure proper protection. I would recommend trying a thicker oil, 5w-30 or 5w-40, and doing a change in between services; that should alleviate your problem. Especially since youre getting higher in mileage, the thin oil just can't last all the way to the next service interval. also, if you drive hard and rev high, expect to be changing your oil sooner than recommended...hope this helps

shaun.barnard

Hi guys I have an '06 C 55 and every 200km its asking for 1lt oil, I filled it twice now with Mobil 1 0w40 but surely that cant be right? I did ride it hard on the freeway once or twice in those 200km but not that bad that I think it would need oil. Maybe I need thicker oil? I've had the car for about a month now and it has 137k km on the clock.

Glyn M Ruck

Please continue to use the approved oil in that engine. Cam & tappet protection is vital.

Some oil consumption is fine but that is too much. The trouble with used AMG's is you never know how hard they have been thrashed. Especially in SA. They are however very tough engines.

That said you might have a leak. Most common cause on that series/family of engines is the cam bore blanker plugs on the rear of the cylinder heads. Please check this. There are different configurations. Some engines have a vacuum pump mounted where the one cam blanker goes. Otherwise have a compression test done or even better a cylinder leakdown test. That will tell you whether you have ring belt wear or require new valve stem seals. If you run down a hill against compression and the floor it do you get a big puff of blue smoke from the exhaust?





Bulletin:

Oil Seepage From Back of Cylinder Heads on Mercedes M272/273 etc. Engines


This bulletin affects all Mercedes vehicles equipped with M272/273 engines built up to June 2008 production date.



If you receive customer reports of oil seeping from Mercedes vehicles equipped with M272/273 engines, the cause could be the round plastic expansion plugs on the back of the cylinder heads (Figure 1). To resolve, perform the following.

Note: As of June 2008 production, new improved plugs were phased into production.

There are two different size plugs as listed below:
• p/n - A000 998 55 90 – 2 small expansion plugs
• p/n - A000 998 56 90 – 1 large expansion plug (engines without vacuum pump)

Remove the existing plugs, clean the opening and install new plugs (Figure 2). Note: The plug opening should free of grease or oil. No sealer should be used in the installation of the new plugs.

Good luck!

shaun.barnard

Thanks for that valuable info, i went and took the engine cover off now to look but didn't see any traces of oil leaking, the car does however smoke when you floor it, i wasn't sure if it was over-fueling or what but it makes more sense now that is burning oil, maybe i didn't want to believe that so what do you think? Rings? Valve stem seals?

Glyn M Ruck

It could be either or both. Do a dry & wet compression test to check rings. Also make sure that all breathers are not clogged. A clogged breather can build up crankcase pressure & cause oil to bypass rings.

At that consumption I'm worried that you have a broken ring. At idle do you hear any ticking from the engine other than injectors & cam to tappet?

Glyn M Ruck

Remember to compression test at WOT (wide open throttle)

shaun.barnard

Thanks for all the help Glyn, so im just going to have to take it to the dealer and hope for the best. I don't hear any strange noises in the engine though so I hope its something clogged as you've mentioned.