W164 rear SAM unit gone

Discussion in 'Engine' started by Werra2006, Jul 17, 2017.

  1. Werra2006

    Werra2006 New Member

    Messages:
    2
    Joined:
    May 30, 2012
    Location:
    Oldbury
    Car:
    W164 ML280 2006
    Last Thursday I got a mrssagebon the dash saying that my brake lights had gone and I had to change. The backup light were turned on and wouldn't turn off. So I bought a paid and changed both but the message remained. I took the car to Andy Gayle who told me today that its the SAM unit that is gone and replace will cosy me £399 plus VAT. Now that's a lot of money considering that they'll also charge me for the diagnostic and labour so would be looking at a bill of £600. Want I want to know is.......is the SAM repairable and who would you recommend? Is buying a 2nd hand advisable?

    Thank you
     
  2. kid-jensen

    kid-jensen Hardcore MB Enthusiast

    Messages:
    1,167
    Joined:
    Dec 16, 2002
    Location:
    Epsom Downs
    Car:
    ML 320 W164
    If you trust the opinion of Andy Gayle, the SAM is the ONLY issue, then it's safe enough to buy a used one.

    Buy on ebay and if it doesn't work it can be returned.

    Doesn't work like that if it turns out to not be the SAM after all....
     
  3. OP
    OP
    Werra2006

    Werra2006 New Member

    Messages:
    2
    Joined:
    May 30, 2012
    Location:
    Oldbury
    Car:
    W164 ML280 2006
    Thanks PaulG. I got the SAM unit off eBay for £200 and everything is working as it should. The one I removed looked like it had some water damage. Upon inspection of the storage area, I coudnlt see any water & I couldn't figure how out how and from where the water went it there. Probably something to research on next.
     
  4. -AJC-

    -AJC- Active Member

    Messages:
    74
    Joined:
    Dec 16, 2014
    Location:
    Surrey
    Car:
    ML 320 CDI
    Glad you sorted it.

    Its a common problem and you can sometimes clean the circuit board on the Sam by using Isopropyl alcohol (Maplin), which will bring it back to life. Probably a good idea to replace the rear light water seals too before the new one gets damaged.
     
  5. adam7788

    adam7788 New Member

    Messages:
    1
    Joined:
    Jul 31, 2018
    Location:
    surrey UK
    Car:
    ML 280 cdi Sport 2007
    Can any W164 Rear SAM unit be used from the yr of manufacture - or do I need the exact one for my car - with the exact part number. Ive bid on a couple of ebay and the vendors have said they wont work with my 2007 W164 when Ive given my VIN, despite the ebay compatibility tool saying that they would work. Can anyone help me on this. They were W164 SAMs.
     
  6. toolman1954

    toolman1954 Hardcore MB Enthusiast

    Messages:
    1,100
    Joined:
    Sep 16, 2004
    Location:
    Leven, Fife / Northampton
    Car:
    2003 320 CDI Avantgarde, 1997 312d Sprinter
    Hi,
    Welcome to the forum, you will need to replace like for like, so that means getting the part numbers off of your original SAM unit. Sometimes the part numbers are not so easy to see without a bit of dismantling, but perhaps use the photos from vendors on Ebay to find out where the part numbers are stamped, to help you find yours.

    Steve.
     
  7. optimusprime

    optimusprime Hardcore MB Enthusiast

    Messages:
    3,129
    Joined:
    Dec 29, 2013
    Location:
    Kidderminster Worcestershire UK
    Car:
    Mercedes W124 260E M103
    Talk to Rob at threpointedparts@hotmail.co.uk or 07737360966. had lots of parts from Rob .On the other hand thay can be repaired see video on youtube
     
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