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C320: 2002 c320 srs esp abs lights always come on when starting,

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2002 c320 srs...
2002 c320 srs esp abs lights always come on when starting, now brake light and sos tileade are illuminated, rear bulbs are good, battery is 100 % alternator is 12.5 v+, there is not a brake light switch on this model. what do you think bas also comes on fuses are all good
Submitted: 2 years ago.Category: Mercedes
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Answered in 3 hours by:
7/10/2015
Mercedes Mechanic: Kevin, Master tech replied 2 years ago
Kevin
Kevin, Master tech
Category: Mercedes
Satisfied Customers: 2,875
Experience: Diagnostic technician
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Hi I'm Kevin can you confirm charging voltage test with car running and see what voltage you have at battery?
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Customer reply replied 2 years ago
13, vdc
Mercedes Mechanic: Kevin, Master tech replied 2 years ago
Ok that's a bit low looking for 14.2 is perfect check this again with the lights ang rear heated screen turned on I suspect your alternator is failing
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Customer reply replied 2 years ago
it will be a 1/2 hour till i am free of dialysis machine
Mercedes Mechanic: Kevin, Master tech replied 2 years ago
Ok take your time come back to me when your ready if I'm not online il get back to you as soon as I can
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Customer reply replied 2 years ago
14.06 v
Mercedes Mechanic: Kevin, Master tech replied 2 years ago
Ok so 14.06 under load 13 normal
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Customer reply replied 2 years ago
correct
Mercedes Mechanic: Kevin, Master tech replied 2 years ago
It seems a little low to be honest with you I would be starting with an alternator at fault as any low voltage fault will cause system fault lights to illuminate . I would get system scanned for faults to see why the car is putting lights on as it will most likely contain low voltage faults
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Customer reply replied 2 years ago
would you suggest a new alternator or just a voltage regulator, also i have been researching this for two years and think it might be the BAS SENSOR so i have one ordered.
Mercedes Mechanic: Kevin, Master tech replied 2 years ago
Without codes from system it would be difficult to pinpoint any other fault the only thing I can say for sure is that the charging voltage is low I would replace whole alternator if you get me codes I can help further
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Customer reply replied 2 years ago
DTC Code are Speed Control Actuator Assembly Cablr Slack Failure (c1179); Open CIRCUIT HEATING o2 COMPONENT G3/6 RT 02 SENSOR (P0036) : Steering Angle sensor DTC status fault lamp on (c1179) ; BAS release switch OFF A7/751 (180);; BAS diaphramtravel sensor .08 mm A7/761 (182)
Mercedes Mechanic: Kevin, Master tech replied 2 years ago
I suspect you have multiple issues and that low charging is just another issue steering angle sensors are common on all mercedes of this age I've not come accross the other faults in the abs I also don't have any info on the bad codes you have given I can open question up if you like there may be someone else online that can help more with this
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Customer reply replied 2 years ago
I'm sure you are correct after the bas is replaced (and alternator) i will investigate a new front SAM. anyway thanks for trying, and you may post the question.
Mercedes Mechanic: Kevin, Master tech replied 2 years ago
No worries a bit restricted with info for this one I've open question up so someone else can try and help
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