Keith from IRepair Autos we're looking
at a mercedes ml-350 2006 plus this
Mercedes is displaying the issue where
turn on the radio and another you see
you turn on the radio and there's no
audio nothing turn the volume all the
way up there is no audio and we're going
to be looking at the cause of this
I've already checked the fuse for the
amplifier shown you that in previous
videos and diffuses good someone i'll be
taking a look at the amplifier the
amplifier on this unit this model is
located under the driver's seat so we're
gonna push the driver's seat all the way
to the front just to give us access
going to push the backrest all the way
up now the amplifier is buried on the
carpet and just like the battery is
buried underneath the carpet on the
passenger side so as the amplifier so
we're going to be cutting into this
carpet and i'll show you how to do that
so the ignition turned off you're going
to measure from the back of this all the
way up to four and a half inches going
to use a box cutter and then you're
going to take a straight edge so
four-and-a-half inches in going to take
a straight edge
and you're gonna hear them cut the
four-and-a-half inches in the back to
boulder up you're going to then put the
carpet so i'm going to use a 10
millimeter socket and have a extender on
it to reach down so that we can grab and
remove that 10 millimeter not that's
holding that plastic cover down let's go
down into this carpet that I just
removed the carpet up the plastic and
wanna pull it back
see that little knot right there so we
just remove the first bowl that's right
onto here there's another boat that's
under here that we're now going to
remove next you like they're traveling
to the right and up
there's a bolt right here and so went
ahead and cut across and then up just to
give myself access to that other not
so once again using my extendo my socket
which is a 10 millimeter socket i'm
going to reach them in loosen that up
and take it off
alright so now i know that the amplifier
sits on the here and it's bolted to the
frame of the car the internal section of
the frame in this boxing housing on the
here but to gain access we can remove
this plastic we were already moved one
two three bolts or not so i should say
123 nuts and then this passageway this
chamber that pushes out air conditioning
needs to be removed and it's snaps here
and there's a little snap there so we're
going to go ahead and remove that it's
not so easy that came off so i'm just
going to use a long school that I found
or you could use a socket extender some
of the tool
let's take a look that's the amplifier
right there looks like it's held in
place by that 10 millimeter bolts i'm
going to get these ten millimeters see
the little of corrosion around it looks
like salt it's actually moisture so
we're gonna go ahead and remove the
amplifier for further investigation
we're gonna start by removing this
harness clip that you'll have to
depressurize your fingers to press that
button right there and slide this pickup
so that's disconnected i'm going to
depress take off the fiber-optic I don't
need to gain access to this 10
millimeter bolt right there
so the next thing we're going to do know
is remove the first 10 millimeter bull
care should be taken when removing this
one because the fiber-optic lines
already paid on there is a lot of the
third one that we're going to loosen up
it's just a hope it off completely off
this was and out givers wow look at that
have a nice little plan right there
so that this unity been assuring working
right now so I'm looking at the module
is amplifier you can see that there's
rust on it on the chassis words bolted
down
that's the sign of moisture coming into
the car and possibly damaging the
amplifier this will take some diagnosing
and possibly some repairs the amplifier
is an integrated circuit board and
unless you know electronics or less you
see an obvious blown apart then
replacement over repair is probably your
best bet if you like this video if you
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this amplifier and hunting down the
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thanks for watching