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[Solved] Mercedes A-Class W168: Locate T3 Relay & Relay Panel in A190 Gasoline Engine (Image Link)

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  • #1 17235310
    Anonymous
    Level 1  
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  • #2 17235363
    piotrekwoj1
    Level 42  
    How am I not mistaken under the floor upholstery on the bulkhead in the area of the passenger's legs.
  • Helpful post
    #3 17235365
    Pedros050
    Level 43  
    Hello. On the right, in the direction of travel, on the bulkhead wall in a plastic housing.

    Added after 1 [minutes]:

    @ piotrekwoj1 There are fuses and a battery.
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  • #4 17236100
    Anonymous
    Level 1  
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    #5 17236106
    Pedros050
    Level 43  
    I wrote where else are the relays, especially K3.
  • #6 17236181
    Samuraj
    Level 35  
    Not underfoot. Remove the mat and look behind the passenger side dashboard on the bulkhead wall.
  • Helpful post
    #7 17236411
    piotrekwoj1
    Level 42  
    PITERRR wrote:
    Hello. On the right, in the direction of travel, on a bulkhead wall in a plastic housing.

    Added after 1 [minutes]:

    @ piotrekwoj1 There are fuses and a battery.

    If you read my post more carefully, you would know what I wrote. I clearly wrote "on the bulkhead".
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    #8 17236417
    Pedros050
    Level 43  
    On the right, in the direction of travel, on the bulkhead wall in a plastic housing. Is not it obvious @ piotrekwoj1 ?
  • #9 17236509
    Anonymous
    Level 1  
  • #10 17236527
    abart64
    Level 33  
    Access is available from the motor side by unscrewing 4 torx screws. The box is rather on the engine side, from the inside there is a sheet for M6 nuts under the lining.
  • #12 17236566
    Anonymous
    Level 1  
  • #13 17236766
    abart64
    Level 33  
    Do you expect K3 to be written on it?
  • #14 17236793
    Anonymous
    Level 1  
  • #15 17236804
    abart64
    Level 33  
    It's hard, everyone has made efforts and showed you the place, and if you can't see it, we can't help it.

    Added after 14 [minutes]:

    This is not a can of air conditioning, but a sticker on it says about air conditioning. There are relays there, they don't have to be all manned, it depends on the version. There is this K3.
  • #16 17236955
    milejow

    Level 43  
    moddom wrote:
    I also dismantled the air conditioning box housing

    These are the relays you are looking for. K3 is a starter relay and it is in this box.
    .
    moddom wrote:
    panel with 5 relays as in the photo, because the diagram attached to the car's electrical system clearly suggests it.

    Clearly, the diagram suggests 7 relays, not 5, and it is in the full option that does not necessarily equal yours.
  • #17 17237182
    Anonymous
    Level 1  
  • #18 17238723
    milejow

    Level 43  
    moddom wrote:
    Unfortunately, there are no markings as in the diagram, i.e. 002 542 23 19,

    And it will not, because these are the numbers of spare parts, irrelevant to the user (from the manufacturer's point of view). There is only a drawing with the relays marked and a description of what, this description will not be on the relays.
  • #19 17244918
    Anonymous
    Level 1  
  • #21 17245598
    milejow

    Level 43  
    moddom wrote:
    Most likely, the cause is electronics (this unfortunate malicious chip, to be exact).

    What is missing on the relay during start-up, plus on the coil or the control ground from the ECM?
  • #22 17465837
    Anonymous
    Level 1  
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Topic summary

The discussion centers around locating the T3 relay and relay panel in the Mercedes A-Class W168, specifically the A190 gasoline engine. Users suggest that the relay panel is typically found on the bulkhead wall behind the passenger side dashboard, often obscured by carpet or upholstery. Some participants mention that access to the relay box can be achieved from the engine compartment by removing screws. There is confusion regarding the presence and labeling of the K3 relay, with users sharing diagrams and images to clarify their points. Ultimately, the author discovers multiple relays but struggles to match them with the expected markings from the vehicle's electrical diagram. The conversation highlights the challenges of identifying specific relays and troubleshooting potential electrical issues.
Summary generated by the language model.
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