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W221 Harmon Kardon amp repair

Discussion in 'Electrics, Vacuum, Ignition and ECU' started by alexanderfoti, Aug 23, 2017.

  1. Milu

    Milu Active Member

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    Joined:
    Feb 19, 2016
    Location:
    Doncaster
    Your Mercedes:
    W216 cl500
    Had my amp to BBA in October when I bought the car. It's now intermittent after less than 2 months. I have everything functional inc phone and radio stations but no sound on anything
    I suppose I have to contact BBA to give them chance to sort before I start moaning
    I have had a look and the fibre optic flashy thing is working including a return flash from the amp .
    I guess the fact I have radio station means the unit is awake but no output stage.

    What a load of sh*t
     
  2. Botus

    Botus Senior Member

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    UK
    Your Mercedes:
    S500/2010/500
    the fix doesn't work - many have tried it and been disappointed, which points me to think its a reflow issue rather than a few capacitors need a kick - poor quality manufacture not cheap components

    there's a post about HK doing a repair service, which no doubt just gives you a new amp as it would be much cheaper than having people strip it down and screw in a new circuit board?
     
  3. Milu

    Milu Active Member

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    Joined:
    Feb 19, 2016
    Location:
    Doncaster
    Your Mercedes:
    W216 cl500
    Yep it's just crap stuff. Thing that annoys me is where the value is for the original purchasers of these 'top of the range' motors. Just because someone can afford 90k for a new car it shouldn't follow that they can easily afford( be ripped off) expensive repairs after just a few years.

    I'm an upholsterer and often work on furniture that is 30+ years old,where the customer paid much more than average but got value down the line as the furniture last very well. Not the case with the mugs that buy cars.

    If I don't get much joy with my current repair then maybe HK is the way forward,especially if it's cheaper than paying MB mark up.
     
  4. Botus

    Botus Senior Member

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    UK
    Your Mercedes:
    S500/2010/500
    3 year old Bentley's with NAIM hi fi all go wrong

    the world moved to let trash the planet asap and make multi millionaires in to multi billionaires
    the French have the right attitude, the British are pathetic slaves, to dim to notice for 80% of them their quality of life halved in the last 30 years
     
  5. Milu

    Milu Active Member

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    Location:
    Doncaster
    Your Mercedes:
    W216 cl500
    Well I've had word today that it's water damage. I must admit I'm surprised because the area was all dry. Of course this means it's a different repair so I have to pay again if they sort it
    Bit hacked off that the first repair fee doesn't cover it but what can I do? If I just have it back I'm no better off.
    Has anyone had water damage in the CL? If so where from?
     
  6. Botus

    Botus Senior Member

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    Your Mercedes:
    S500/2010/500
    its easy to think water drips straight on it whenever you open the boot in the rain, or having washed the car....

    if you watch, a good 20ml will roll off the boot every time its wet and it drops "directly" down where the amp sits... however if the boot trim is in place there a massive bucket around the boot hinge that catches it (so if in place should not land on the amp ever...) but it will lead to some general dampness if you keep opening in the rain

    oh and the air vents to let air flow through the car, are extraordinarily placed... with a lot of very big holes a good few inches across mounted so low down in the inner rear wing a big puddle, small flood or judicious car washing will allow a good few gallons to be let in so the amp, sat nav, dab and tv models on the left side, and a few others door, seat and what have you modules on the right all die at once. And you will never even get a damp boot floor to give you a clue. Its beautifully designed
     
    Last edited: Dec 18, 2018
  7. Milu

    Milu Active Member

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    Doncaster
    Your Mercedes:
    W216 cl500
    Lol yeah great design.
     
  8. Submariner1

    Submariner1 Senior Member

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    Location:
    Windsor Berkshire
    Your Mercedes:
    CL500 2009 5.5
    What CL ?
    If its a CL 216 there is a weird joint on the edge of the boot. As you open it , it is supposed to stop water running down.
    But its strategically placed to start a drip, directly onto the arm bracket that directs water straight into the amp area!
    Luckily my drip just got the boot liner, no water damage to amp.
    But had it been a high mileage car, pretty sure it would soak through the liner and onto the Amp.
    See all the seriously corroded amps for sale on ebay.

    I just put a tab of tape a little higher so the forced drip does not hit the boot arm.

    BBA reman fixed my Left Channel output problem ...
    But they dont tell you exactly what they did. Like changed a capacitor etc?
    So they might just have replaced a £3 resistor ha ha ...
    But as mine was the most expensive £1400 version of the Amp a £245 repair was most welcome.
    They also apparrently cleaned a small circle of dust/soot off the board.

    Some say that is brake dust .. sure looks like it directly under the fan.
    FD311127-67D8-4F0B-9B75-DDA27E8A60D7.jpeg

    I really dont like the wheel arch breather design ... right by the Amp. Its just a series of plastic flaps.
    If your wheel liner cracked, bye bye Amps and a ton of other electronic stuff.n:(:(
    93C066EE-D7CF-4D74-9E86-EBFF3979ECEC.jpeg
    Amazingly even after lots of powerwashing ... mine was bone dry inside!
    Note mark on the Amp was a glue residue from the label. I.e. Not corroded.
     
    Last edited: Dec 20, 2018
  9. Milu

    Milu Active Member

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    Your Mercedes:
    W216 cl500
    Mine is exactly as yours above. Although I have another module in front of the amp as well. The whole area was bone dry when I removed it and no wet carpets etc. I am going to have a good look around whilst reinstalling at the weekend. Fingers crossed

    Also I will say that the service from BBA is very good. Just a little miffed that I've paid for 2 repairs in 2 months.
     
  10. Botus

    Botus Senior Member

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    Your Mercedes:
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    did you drive with the boot trim missing.... on a 221 if wet and you open the boot the water will literally go off the boot and inside the amp

    a silver module directly in front, is the TV
    a black module 8 inches further back leaning toward the wing is the DAB
     
  11. Milu

    Milu Active Member

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    Your Mercedes:
    W216 cl500
    Amp back in now
    I'm a bit confused though regarding the water ingress issue. My car was very wet as I opened it just now. However I couldn't see any drips getting in or drips on the carpet or the void where the electronics sit.

    Am I looking in the wrong place?
     
  12. Botus

    Botus Senior Member

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    Your Mercedes:
    S500/2010/500
    maybe not so bad on the 216. on the 221 its not the bit near you as you open the boot its from the boot lid, it rolls sideways and drips off the edge of the boot near each hinge.

    If its been polished and the water has beaded then its far worse and you can get more than 40 ml run off each side every time its wet and it runs inside the boot seal but not into any part of the boot the user will see.... almost exclusively falls in the hinge behind the side carpet so if you aren't watching the drips/stream of water fall by the hinge, you might never know this design failure exists

    I wipe the boot lid of water with my hand and open it slowly holding it around 1 foot open and waiting for 20 seconds, and if really wet wipe the drips away as they fall. Best car in the world o_O
     
  13. Riva

    Riva New Member

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    Nov 11, 2019
    Your Mercedes:
    CL500 BlueEfficiency/2010/M278
    That black "dust" is a burned out chipset/transistor not brake dust :D
    Sorry I am reviving a year old thread but I am going through similar issues myself right now, havent opened the circuit yet though. I also have issues during winter only with the amp totally dead right now. The amp also drains my battery
     
  14. OP
    alexanderfoti

    alexanderfoti MBO Forum Supporter Authorised Forum Supporter

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    Your Mercedes:
    W221 S65 AMG - W204 C63 AMG + Various other MB's
    My experience is that it's soot/brake dust/emissions as its very close to the exhaust and blows it straight onto the main board. Doesn't smell like like the usual blown silicon.
     

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