Radio low volume problem - Fixed!
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Newbie
Joined: Apr 2022
Posts: 6
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C55 Z4M Z3
Radio low volume problem - Fixed!
Thought I’d post this for folks who may have this issue in the future. I searched and found similar issues but not exactly the same. So here goes…
I have a relatively new to me 2005 C55. I’ve been driving it now as a daily for a few months and it’s been great. One day I had no volume from my radio (I thought). I have the upgraded Harmon unit and nav / Command. All of that seemed to work fine except what turned out to be very low volume. If the car was off and I turned up the radio all the way I could just hear the radio. Interesting. I read all the posts about pulling various fuses to reset the system but none of those worked. I suspected the amp had gone out - now to find the amp.
I can confirm the amp was in the trunk on the passenger side under the fiber trunk liner. You have to remove a few trim clips and push type retainers, peel back the trunk liner ( did not have to completely remove liner) and you’ll see the amp in a bracket. It’s the thing with the big heat sinks all over it. I sourced a used one from the bay and paid a bit more for the identical part number. There are a number of variants and I didn’t want to be close but wrong! Cost about $200 shipped. Also used a seller that offered a 90 return policy. Put it in this morning and bingo, full sound again. Took about 20 minutes and the hardest part is getting the trunk liner correctly positioned in the trim piece.
So if you have just a little sound you may need an amp! No sound at all has lots of other possibilities.
I have a relatively new to me 2005 C55. I’ve been driving it now as a daily for a few months and it’s been great. One day I had no volume from my radio (I thought). I have the upgraded Harmon unit and nav / Command. All of that seemed to work fine except what turned out to be very low volume. If the car was off and I turned up the radio all the way I could just hear the radio. Interesting. I read all the posts about pulling various fuses to reset the system but none of those worked. I suspected the amp had gone out - now to find the amp.
I can confirm the amp was in the trunk on the passenger side under the fiber trunk liner. You have to remove a few trim clips and push type retainers, peel back the trunk liner ( did not have to completely remove liner) and you’ll see the amp in a bracket. It’s the thing with the big heat sinks all over it. I sourced a used one from the bay and paid a bit more for the identical part number. There are a number of variants and I didn’t want to be close but wrong! Cost about $200 shipped. Also used a seller that offered a 90 return policy. Put it in this morning and bingo, full sound again. Took about 20 minutes and the hardest part is getting the trunk liner correctly positioned in the trim piece.
So if you have just a little sound you may need an amp! No sound at all has lots of other possibilities.
Last edited by Skytow1; Oct 1, 2022 at 01:13 PM.
Newbie
Joined: Oct 2022
Posts: 6
Likes: 0
E-350
Thought I’d post this for folks who may have this issue in the future. I searched and found similar issues but not exactly the same. So here goes…
I have a relatively new to me 2005 C55. I’ve been driving it now as a daily for a few months and it’s been great. One day I had no volume from my radio (I thought). I have the upgraded Harmon unit and nav / Command. All of that seemed to work fine except what turned out to be very low volume. If the car was off and I turned up the radio all the way I could just hear the radio. Interesting. I read all the posts about pulling various fuses to reset the system but none of those worked. I suspected the amp had gone out - now to find the amp.
I can confirm the amp was in the trunk on the passenger side under the fiber trunk liner. You have to remove a few trim clips and push type retainers, peel back the trunk liner ( did not have to completely remove liner) and you’ll see the amp in a bracket. It’s the thing with the big heat sinks all over it. I sourced a used one from the bay and paid a bit more for the identical part number. There are a number of variants and I didn’t want to be close but wrong! Cost about $200 shipped. Also used a seller that offered a 90 return policy. Put it in this morning and bingo, full sound again. Took about 20 minutes and the hardest part is getting the trunk liner correctly positioned in the trim piece.
So if you have just a little sound you may need an amp! No sound at all has lots of other possibilities.
I have a relatively new to me 2005 C55. I’ve been driving it now as a daily for a few months and it’s been great. One day I had no volume from my radio (I thought). I have the upgraded Harmon unit and nav / Command. All of that seemed to work fine except what turned out to be very low volume. If the car was off and I turned up the radio all the way I could just hear the radio. Interesting. I read all the posts about pulling various fuses to reset the system but none of those worked. I suspected the amp had gone out - now to find the amp.
I can confirm the amp was in the trunk on the passenger side under the fiber trunk liner. You have to remove a few trim clips and push type retainers, peel back the trunk liner ( did not have to completely remove liner) and you’ll see the amp in a bracket. It’s the thing with the big heat sinks all over it. I sourced a used one from the bay and paid a bit more for the identical part number. There are a number of variants and I didn’t want to be close but wrong! Cost about $200 shipped. Also used a seller that offered a 90 return policy. Put it in this morning and bingo, full sound again. Took about 20 minutes and the hardest part is getting the trunk liner correctly positioned in the trim piece.
So if you have just a little sound you may need an amp! No sound at all has lots of other possibilities.
Thanks Buddy
All Fixed Radio back on
