05 S600 Left Tail light wont go out. Defective display
 

Left tail light and backup light wont go out, display says defective anyone? display. Any ideas

One possible problem is water damage to the rear SAM (Signal Acquisition Module). The most common cause for water damage is a plugged drain in the HVAC plenum inside the engine compartment. When the plenum fills from rain or wash water, the water overflows into the passenger compartment, under the carpet. You usually can not see any water - it runs in recessed channels under the carpet, and will eventually fill the rear SAM, causing very serious corrosion and electrical problems.

Searches will show many, many posts discussing the problem...

HI WallyP, I am almost in tears as I write this to you. Fist of All Thank You for the quick response. You are also Top Notch because that's exactly what happened to my ca which I just bought 2 months ago. The plenum /Heed/ HVAC drain was clogged and full of water when I found it yesterday afternoon, water got in and front passenger carpet is water logged, totally soaked. We had torrential rain in Florida yesterday afternoon causing the plenum drain which was already clogged to overflow inside the car. So I am in Big Trouble. I used a coat hanger to clear the drain and let all the water out What do I do now? Where do I start? What needs to be replaced usually when that water gets in like that. I will pull the carpet today (Saturday) and try to dry some water. Please Give me some advice on what to do next. Thanks in advance.

Thanks Tusabes for the suggestion but I am not going to put a claim as I just put one in last month when my niece borrowed my car. They might drop me.

Thanks a lot Wally, I will do as you say and see what happens. I will watch some video on how to remove back seat and rear SAM/ I will keep you posted.

SAM pics 2005 S600 W220
 

https://cimg7.ibsrv.net/gimg/www.mbw...08c01d31ef.jpg
https://cimg0.ibsrv.net/gimg/www.mbw...f6d1d562fc.jpg
https://cimg1.ibsrv.net/gimg/www.mbw...68e28302f3.jpg

SAM pics 2005 Merc S600 Rear SAM

I pulled up the front carpet it was wet but not too much water and the same thing in the rear next to the SAM and Fuse block, not too much water but to be safe, I will jack up the car from the rear to push any remaining water towards the front. I will also jack it up from the front while the SAM is up and see water come again to the rear. I will Update tomorrow.

Hi there everyone. Quick question. Which part is the SAM? The part with the Orange sticker that say says Motorola Made in the USA. It has the word NACH on the sticker. Please let me know so I can order the SAM. I attached 3 pics to this post also. Should I check all the fuses from the fuse block or is it Mostly the SAM that usually gets shorted out?

Hi there Senor Tusabes.

Hi there everyone. Quick question. Which part is the SAM? The part with the Orange sticker that say says Motorola Made in the USA. It has the word NACH on the sticker. Please let me know so I can order the SAM. I attached 3 pics to this post also. Should I check all the fuses from the fuse block or is it Mostly the SAM that usually gets shorted out?

https://cimg1.ibsrv.net/gimg/www.mbw...ae58ae48bf.png
Sam

Hi there Tusabes, here is the pic of the rear SAM. Now once I buy one, even if the same number. Does it have to be REPROGRAMMED? If so, how? Do I have to take it to a Dealesrship or a Auto Repair Shop? Will the car start after I put the new SAM in? If I have to take it to the dealer to be reprogrammed.
https://cimg9.ibsrv.net/gimg/www.mbw...ad62f1b61f.jpg
Rear SAM 2005 S600 W220.176 - A032-545-8432
Also will the car start after I put the new SAM in?

Hi there Wally, quick question that I asked Tusabes. My rear SAM A032-545-8432 from a 2005 Merc S600 W220.176. After buying the new rear Sam. Does it have to be reprogrammed? And if so, How and Where do I get it done? Dealership or Auto Rep
https://cimg6.ibsrv.net/gimg/www.mbw...41bfa4780a.jpg
2005 S600 W220.176 Rear SAM A032-545-8432
air shop?

Hi, no it does not need to be reprogrammed. Just make sure you get the same exact part number.

Thank You Again Tusabes, I bought the SAM that you saw on Ebay. Unfortunately it is located in the U.K. (Europe) therefore I have to wait for about 9 days before receiving it. It came to about $117 the shipping was about $40 U.S and it was like 30 Euros or pounds .:urock:

I will definitely let everyone know how things turn out after receiving and installing the New Rear SAM. After drying most of the water under the carpet front and rear on the right side, I did not remove carpet on driver/left side as it was not wet. I started the car, the only thing that did not work visually was my Gas Gauge/Fuel Tank Gauge, I ran an MB2-Isoft diagnostic tool and it said that it could not communicate with Rear SAM. Also, the rear Tail Lights have gone out after drying out the water in the area where the SAM was located.

Hi everyone, I want to thank everyone who helped me with bad rear SAM due to clogged Heed drain, specially Tusabes and WallyP. After receiving an used SAM from the U.K. Yes indeed I was able to locate an exact match on Ebay from a gentleman in the United Kingdom. He shipped very quick via DHL in 3 days, quite surprise of the speed on the delivery from Europe. I replaced mine after drying the water and the carpet. All my troubles disappeared, the rear tail lights stopped flickering, Fuel gauge started working again etc... So I wanted to show my gratitude by Thanking everyone and give thumbs up to the MBworld forum community. I am very Grateful to you all

Heed Drain Valve cleaning = part of regular Maintenance
 

[Yes Sir, GREAT Advice. Anyone who has an S Class. Regularly cleaning the Drain Heed/HVAC Plenum valve or Drain hole is a must.If not, you are playing with fire with Gasoline in your hand. LoL

UOTE=tusabes;7567889][/QUOTE]

Yes, this happened to me 2 weeks after I bought my car, spent days with hair dryer and pulling out ever plug and wiping them down, still had to replace Sam. I put a household de humidifier in car for two days to get all moisture out.