rear SAM

[bembo449]

anyone know exactly what the rear SAM unit controls on the ML / GL 2008 era car ?
thanks

 

[alexanderfoti]

all rear lights
rear washer
power boot motor
fuel gauges
Alarm siren
reversion camera
overhead control panel

and a few other bits.

 

[Uncle Benz]

Electric front seats too

 

[bembo449]

thanks guys , that explains alot

 

[bembo449]

Looking for more SAM unit info , i spoke with Alex earlier ( thanks pal ) we agreed there was a com issue but many brains make for more ideas right ?
So currently this is whats not working on the GL320
Horn , wipers , indicators , loads of traction control related things DSR etc , and the fans on the engine are running whenever the car is driven , it does run and drive fine bar the above , biggest issue is it will not communicate thru OBD which is a real pita

 

[alexanderfoti]

Looking for more SAM unit info , i spoke with Alex earlier ( thanks pal ) we agreed there was a com issue but many brains make for more ideas right ?
So currently this is whats not working on the GL320
Horn , wipers , indicators , loads of traction control related things DSR etc , and the fans on the engine are running whenever the car is driven , it does run and drive fine bar the above , biggest issue is it will not communicate thru OBD which is a real pita

Sorry, my day was not good today, after 10+ hours on a fing wheel speed sensor fault! Call me tomorrow at your convenience

 

[Blobcat]

I’d be looking for water ingress

 

[alexanderfoti]

I’d be looking for water ingress

I'm looking for matches.

 

[Blobcat]

I'm looking for matches.

I almost was with the smart…

 

[bembo449]

I’d be looking for water ingress

But where pal , rear sam defo had water on it , front ones mint , if we can confirm all the above not working items are controlled from the rear sam then it obvs needs a new one ! Assuming the sam units on these MB dont lose the code if disconnected???

 

[Uncle Benz]

Hmm, sounds steering column module to me, but OBD down is a concern

Have you checked the K line fuse?

 

[bembo449]

Sorry, my day was not good today, after 10+ hours on a fing wheel speed sensor fault! Call me tomorrow at your convenience

Alex , you dont have any apologies to make pal , im grateful you even take the time to talk

 

[bembo449]

Hmm, sounds steering column module to me, but OBD down is a concern

Have you checked the K line fuse?

Ok , all the fuses in the engine bay are ok but not fully looked at others , so many things not working is usually a sam issue

 

[Blobcat]

But where pal , rear sam defo had water on it , front ones mint , if we can confirm all the above not working items are controlled from the rear sam then it obvs needs a new one ! Assuming the sam units on these MB dont lose the code if disconnected???

If it had water on, get it opened up and look for damage.

 

[Uncle Benz]

All the things you mentioned can come from steering column module

 

[Uncle Benz]

Quite common for trouble on 164

 

[bembo449]

If it had water on, get it opened up and look for damage.

I did pal , contact cleaner and toothbrush, did fit a spare one bit if anything it was worse ! Cant say there was any significant damage , BUT if all the things not working are power / control by the rear sam then it stands to reason it needs a known good one coding in OR a new one coding in from MB

 

[Blobcat]

I did pal , contact cleaner and toothbrush, did fit a spare one bit if anything it was worse ! Cant say there was any significant damage , BUT if all the things not working are power / control by the rear sam then it stands to reason it needs a known good one coding in OR a new one coding in from MB

I’d be looking at @Uncle Benz advice above first

 

[bembo449]

All the things you mentioned can come from steering column module

Including the engine fans ? Blimey

 

[Uncle Benz]

Including the engine fans ? Blimey

No, that’s from the K line down. Don’t rule out nervous chatter from the faulty unit filling the canbus so nothing else can get a word in. Engine ecu will run the fan full speed if it can’t communicate with anything else. Could be to protect the engine, could just be a tantrum thing, but they do do that.