SL/R231: SL550 back speakers PROBLEM SOLVED!
I have most of my "old school" music in iTunes on my computer. My co-worker bought some recordable CDs. iTunes lets you build a playlist then burn them on the disc. It's pretty simple, just click on the FILE tab in the upper left of iTunes and make a new playlist. You then click on the FILE tab again and scroll down to the "burn disc" prompt. The key, though, is, when you get a prompt to burn the CD you can change the format from burning a regular CD to choosing the option of a DVD.
When it plays in the car is shows as an MP3(?) so I may not be getting the complete DVD-A experience but it is still a big upgrade from what I've been listening to. I tried a variety of tunes: Joni Mitchell's Chinese Cafe, Sting's Brand New Day, and Yes's Close to the Edge. My chest rattled and the separation of the instruments was distinct and crystal clear.
Another quirk, you need to scroll through your stereo to get a prompt to download all the data on the disc, which includes displaying the CD cover along with the usual song/album/artist info.
It's really simpler than I explained it. If you still have questions please message me and I'll set up a time to talk you through it.
I ended up selling my 2013 SL550 when we downsized and I lost a garage space. One of the sadder days in memory.
If anyone is interested in the amp, please PM me. I'll ship it to your door (lower 48) for $120.00 all in. Amazon is getting $200.00 today.
I ended up selling my 2013 SL550 when we downsized and I lost a garage space. One of the sadder days in memory.
If anyone is interested in the amp, please PM me. I'll ship it to your door (lower 48) for $100.00 all in. Amazon is getting $200.00 today.
I ended up selling my 2013 SL550 when we downsized and I lost a garage space. One of the sadder days in memory.
If anyone is interested in the amp, please PM me. I'll ship it to your door (lower 48) for $120.00 all in. Amazon is getting $200.00 today.
I've got a really nice set of OE 19" R231 wheels listed on MBWORLD Marketplace if anyone is interested.
Thanks Guys and Good Luck with the Install!
https://mbworld.org/forums/market/838344




I've got a really nice set of OE 19" R231 wheels listed on MBWORLD Marketplace if anyone is interested.
Thanks Guys and Good Luck with the Install!
https://mbworld.org/forums/market/838344
The Best of Mercedes & AMG
1/ If the B&O N40/9 Amp ICEPower amp works intermittently, do NOT fall for the dealership's suggestion to buy a new one. It's VERY expensive, like $4,600...Instead, find a radio repair shop. Mine checked poor micro solders and changed two capacitors. Total cost $165. Mostly labor. Works GREAT now!
2/ I was told by the dealership that the second Amp N40/3 was behind the driver's seat... So I removed all panels.... Not there... Then I was told I had to be under the carpet in front of the passenger's seat... I removed everything... NOT there... Then I was told this particular 2013 SL 550 trim did not have a second Amp, just a radio control unit linked to central front speaker.... So I thought: "ok, be it"....And I went to Best Buy to get the Alpine Amp... Well, BB guys was following OEM electrical diagram, and told me there had to be a second Amp labelled N40/3....And he found it...!! Took him an hour though!!! So for everyone who might face this challenge, it was in the trunk behind left side panel...! So much for MB dealership expertise! Net, net: Alpine Amp was $200... installation $150...
In any case, thanks to this thread! Even if it was a trip and a half, It saved me $4,000...! And I now have an amazing surround sound system...! :-) last note: I never understood why there was no front/back fading on that car, but Left/Right balancing... I used to think: "WTF were they thinking!"... LOL! Well, now that I have great surround sound, I get it!! When on driver seat, the back speakers on passenger side are straight line to my ears, whereas the back speakers behind driver's seat are muffled by the seat... To fix that, use Left Side balance, and it is PERFECT! Still weird that there is no Front/Back fading, but at least the Left/Right makes sense now!
Cheers everyone,
Eric
last note: I never understood why there was no front/back fading on that car, but Left/Right balancing...
Eric[/QUOTE]
This thread has gone so long, you could knit a sweater! But there is a lot of information in this 6 year old tome. As to the dealer not being able to tell you off the top of their head where the amp is, I'm not surprised. Even with the MB Electrical Locator all the tech's use, they still struggle. Building a gazillion model cars with hundreds of options for well over a hundred countries in many factories....Even Mercedes isn't sure what they are doing. In the late 1990's, it was so bad that MBUSA had to create their own Location Guide (ETM) for cars built for this market. They had to take apart cars already shipped over here to find and document where everything lived. Hard to believe? Some of the 208 CLK ETM pictures show a car with a NJ license plates! None the less, the amp location IS referenced way back toward the front of this thread.
As to the front/rear fader omission. If you reference posts 80, 83, & 88, you will find how to activate front/rear fading in the head unit. At least on the >2016 models, that fade feature can be activated by going into the engineering menu and turning it on. My guess is some stubborn sound **** over at Hardam Kardom wanted to optimize the Surround function, everything else be damned. I definitely heard some moderate improvement in radio/MP3 sound quality after the change. Good Luck & Enjoy!
Last edited by GermanCars; May 16, 2022 at 09:37 AM.









I told him I would get back to him - unreal that he would over double the price now..... I will be looking at other options (not trying to be cheap, but have a hard time knowing what Steinhart paid and what this guy wants now) as I see some others have installed another amp in the rear, etc.
Ron
I really need to thank whoever started this post. I had the car for over a year and I was always disappointed with the sound. I even took my car to Mercedes for a sound check and they told me it was up to specs so I decided to search on the web. Frankly, when I read on this forum that the car sound was optimized for SACD sources I could not believe it ! At Mercedes, they must have lost their mind. Really ! Mercedes should have done a recall and fix the sound! Anyway, after I read this forum, I bought the Alpine KTP-445U. I went to a Best Buy near me ( I live in Rockville MD - Washington DC area ) not knowing what to expect. It turned out the installer at Best Buy was very knowledgeable and nice. He got the diagram of the car from the web and re-routed the wires to install this amplifier. I feel guilty because he spend 4 hours and he charged me the standard Best Buy feed for a 4 channel amplifier or $125 only.
The sound after installation was much much better and I was very surprised that even the SACD demo that comes with the car seemed to sound much better! ( I was expecting it to sound worse but it rocks now)
Anyway thanks to you all.
PS We should write to Mercedes and tell them they really lost their mind.
Paolo








