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What is this reservoir for.

Discussion in 'Engine, Drivetrain, Fuel and Exhaust' started by Mustafah, Aug 11, 2019.

  1. Mustafah

    Mustafah New Member

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    Your Mercedes:
    C220d 2015
    Im trying to fill up the engine coolant on my sister c220d w205 model. However there are 2 reservoirs with the coolant label on them. If you are looking at the engine there is one of the left and it's black. There is also one on the right and you can see inside it but it's smaller than the one on the left, it's also empty..

    I'm not sure which one to out the coolant into and also what the two different reservoirs are for. There is nothing written in the owners manual about the reservoir on the right.

    All help appreciated. Thank you.
     
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  2. Peter Marshall

    Peter Marshall New Member

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    Your Mercedes:
    C200d/2015/2.2
    Hi the larger one on the left as you look at the engine is for the engine coolant, the smaller one on your right is for the intercooler coolant.
    Thanks Pete
     
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  3. OP
    Mustafah

    Mustafah New Member

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    C220d 2015
    Hello and thank you for replying. So do I put the same coolant liquid in the intercooler coolant compartment ?

    Thanks
     

    Attached Files:

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  4. Jim2

    Jim2 Senior Member

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    Your Mercedes:
    2010 Eclass w212 2.1 CDI
    There is something written on the top of the reservoir ( the black part ) in your pic, that indicates what its for . Can you post another pic, taken from above, looking down at the top of the cap? And also the same type pic from the other reservoir? Don't put any fluid into ANY reservoir in a car, until you are absolutely 100% sure that it's the right fluid for that Reservoir. If you do, it can have serious consequences.
     
  5. OP
    Mustafah

    Mustafah New Member

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    C220d 2015
    Both reservoirs just say caution don't open while hot. I would take more pictures but I'm not with the car at the moment.
     
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  6. Jim2

    Jim2 Senior Member

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    Ok, no problem...maybe take a pic of the complete engine, showing both reservoir's? Like normally, most windscreen washer's show a miniature windscreen, with a jet of water splashing against it. But some only show don't open if hot, or else an emblem of a book,,,,consult manufacturer's instruction's. Do you have the car handbook by any chance? There is usually good info contained in them.
     
  7. OP
    Mustafah

    Mustafah New Member

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    Yes I read the handbook but it didn't have any information on the second smaller reservoir. I rang mercedes and they said it's not something customers would top up themselves so I guess I may have no choice but to visit the dealership.
     
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  8. EmilysDad

    EmilysDad Senior Member

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    Your Mercedes:
    ML350
    You don't need a dealer to top up a reservoir ..... they said customers don't usually top it up themselves NOT they're not allowed to. Mercedes say lots of things ..... they suggest you take your car to them to swap head lights from asymmetrical to symmetrical .... it takes just seconds to do it yourself.
    Does the charge air cooler reservoir actually need topping up?
     
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  9. OP
    Mustafah

    Mustafah New Member

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    Yes it's totally empty with pink residue on the inside. I dunno what to put in it tho.
     
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  10. EmilysDad

    EmilysDad Senior Member

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    Put in what Mercedes specifies for the main radiator, but don't mix specifications of anti-freeze. If you think there's any chance of doing so, drain, flush & drain again before you re-fill it
     
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  11. OP
    Mustafah

    Mustafah New Member

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    The main reservoir already had orange liquid in but the little reservoir had pink stuff in. I'll be sure not to mix.
     

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