320CDI motor reliabillity/Longevity





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  1. #1
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    Default 320CDI motor reliabillity/Longevity

    I have been toying with the idea to purchase a used 2007/2008 320 cdi ML or GL but have been cautioned that if the injectors need attention it is usually very costly. Same applies for the turbo. I believe the injector bank can cost up to R70 000,00 to replace at the agents. Don't know if the figure is accurate though.
    I intend to keep the vehicle for more that 5 years. I tow a caravan every so often. The 2007/2008 vehicles available have on average about 80 000 on the clock.
    Should I rather consider the petrol motor?

  2. #2
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    Good day BraamVW....
    Funny thing , I came to this section of the site to ask the same question... I am looking for longevity from a vehicle and have heard that the ML's are reliable...I cant afford a Toyota LC......and have had two Disco disasters ...(Never again) I need a reliable vehicle that can handle bad roads and a bit of 4x4, must not cost a fortune to maintain... even a Landy can be kept going if you throw enough cash at it, however I cant afford to sit along side the road...... So.... Which ML is the most reliable......Petrol or Desil...What consumption should I expect... what inherent problems do they have......ANY GOOD ADVICE WILL BE WELCOME

  3. #3
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    As far as diesel engines go Mercedes received a bad rep with the first gen 270CDI engines they brought to South Africa, especially with turbo failures.

    The later 320CDI engines have a very good reputation for reliability but as with ALL diesel powered vehicles you must follow maintenance schedule religiously to avoid costly bills.

    I know Mercedes offered the ML with a steel sprung suspension in the 320CDI and 350 Petrol versions. This is the way to go if you want to drive the vehicle for a long period of time out of the Mobilo Drive plan as the air suspension is a VERY expensive fix in the unlikely event of it breaking down on you.

    This does however mean that you will not be able to have the low range box and difflocks that are fitted to vehicles with the optional "OffRoad" Package which includes a very sophisticated air-suspension setup.

    Personally I wouldn't buy any modern high end vehicle out of warrantee/ service plan as the risk of big repair bills outweigh pleasure of owning a prestigious marque.

    If I had to choose however the 350 Petrol would be my choice as the engine is bulletproof.

  4. #4
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    Default

    Quote Originally Posted by Hawkeye View Post
    Good day BraamVW....
    Funny thing , I came to this section of the site to ask the same question... I am looking for longevity from a vehicle and have heard that the ML's are reliable...I cant afford a Toyota LC......and have had two Disco disasters ...(Never again) I need a reliable vehicle that can handle bad roads and a bit of 4x4, must not cost a fortune to maintain... even a Landy can be kept going if you throw enough cash at it, however I cant afford to sit along side the road...... So.... Which ML is the most reliable......Petrol or Desil...What consumption should I expect... what inherent problems do they have......ANY GOOD ADVICE WILL BE WELCOME
    Hawkeye, since you live in Centurion, go to Mercedes Benz Centurion (next to the mall). Go and speak to Shaun there, he is one of there extremely clued up technicians and ask him about the reliability issues regarding the 320CDI motors.

    Before I bought my car I took it there to have it checked out and asked about issues regarding my car specifically, which his response was that the engine/gearbox/drive train is bullet proof, and thus far no major problems.

    Obviously your petrol will be more reliable (No Turbo, fancy injectors or high pressure pump that can break) at the cost of increased fuel consumption. My car is averaging 14.7L/100km over 38 000km and this a previous generation 5.5L V8 which in theory should be the worst you will come across. The new generation ML's will(SHOULD!) definitely have better fuel consumption.
    Last edited by Ne3M; 2011/06/24 at 08:28 AM.
    --Kar

  5. #5
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    Default

    You can also consider a WK Jeep Grand Cherokee CRD. The very same engine and for same prize you might get one with a substantial balance of the maintenance plan. Lots of ML underpinnings.
    Good suspension and Quadradrive 2
    Last edited by Johan; 2011/06/24 at 08:43 AM.
    Johan van Niekerk. I can't spell and my grammar sucks, so deal with it!
    2010 Jeep G/C 5.7 V V T Hemi Overland
    2007 Xplorerhttp://www.fuelly.com/dashboard/

  6. #6
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    Replacement of injectors is part of normal maintenance for all modern commenrail diesels at 80-100k km? I don't think it can be so expensive.

    ML without offroad package you are surely going to miss out.
    Ps 16:5

  7. #7
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    Default

    Good advice so far ... I like the info given and makes perfect sense so far.... The ML is starting to look rather apealing.....

  8. #8

    Default

    A friend of my father has a diesel ML (not sure which one specifically, but it's a fairly new model). He doesn't have anything good to say about it.
    Constant Meiring
    BMW F800GSA
    Renault Duster 1.5DCI 4x4

    SOLD - '96 Defender 90 300TDI - Terrafirma ProSport Shocks & Coils, Khumo KL71 muds, Allisport double core intercooler & FAST ORANGE silicon pipes
    FOR SALE - '03 Discovery 2 TD5 Facelift - WAS remapped (until a certain dodgy indy made off with my NNN ecu), CDL mod


  9. #9
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    Default

    petrol
    Kia Sorento 2.2d A/T
    Honda CRV 2.0 A/T



  10. #10
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    In my own experience ever since a kid, for at least forty years, I have seen that Merc spares are very reasonably priced as long as you buy from the agents. The non-franchised spares fraternity seem to exploit the general idea that Merc spares have to be expensive. A W123 series headlamp lens cost me R26 at the agents and that of a Nissan Skyline set me back R2,200!!! They are reliable cars and I have owned many; next will be a Gelandewagen G350. For the record, the big G wasn't designed as a Rust De Winter donga crawler but as a very reliable and potent overlander, as its name suggests in German. Expect a lifetime of 30+ years if you keep it serviced properly.

  11. #11
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    Default

    Maybe I am just lucky but I have one of the first c270 (albeit sedan) and after 10 years not a moment of mechanical issues

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