Hi guys, just arrived from shopping and on the way recieved a error msg of ABS, ESP and BAS. already checked break lights and they are ok, Could it be the break sensor? should i check with an ODB scanner too?

 

A generic OBDII scanner won't help You need one that can read MBZ's proprietary systems - iCarsoft i980 or MBII, some Autel units or SDS.

 

Hi Rudeney, i connected my Autel 509 and no fault code is available everything is clear. The car drives ok no mecanical noises and it breakes well. The errors only appear when i start the engine. When i turn the ignition off and after the odometer display turns off i turn the ignition on i have no error message. Do you think this can help anything? Were is the break switch located? Tks again

 

Does the your Autel 509 scan the ESP system or is it just a generic OBDII scanner? I am not familiar with all of the Autel units. I know they sell some $40 units that are generic OBDII scanners and won't read ESP (and other systems), but they also make some that are MBZ-specific (costing around $200). ANyhow, if you are getting those warning lights, then there will be codes stored in the ESP module.

As for the brake switch, there is no physical "plunger" style switch. It uses a series of pressure switches on the master cylinder and inside the ESP control unit itself.

 

Tks Rudeney i will try to get a specific reading from another scanner if i have any doubt i ll get back to you

 

Called the dealer just in case and he told me its a valve in the master cilinder costs de 163EUR, i ll try to get a reading first and see what the matter really is.

 

Hi Rudeney today something strange happened, i didn t found anyone to read the errors so this morning i drove to work normally at my lunch break when i syarted the engine the erroro messages appeared as usual so i tried to click the ESP Button hold it for a couple of secondes to off than on and off again. Made my way home with the messages on the dashboard and parked when the engine shutted down i didn t heared the bip but thought maybe because of the music and looked and saw 3 errors displaying. Took the key closedvthe car and entered home when i came back i opened and entered the car started the engine and start driving suddenly i looked and saw that the orange ABS Light was off click the button on the wheel and read no mal function thought wow great. No message yet any idea what could have happened? If i still get a reading wll the codes be readable?

 

You could have a wheel speed sensor that is intermittently failing. But like I said, the best thing is to pull diagnostic codes from the ESP module.

 

I've had a similar issue in the past and made a thread about it, it might be worth a look:
https://mbworld.org/forums/clk-class...04-clk500.html

 

Tks a lot i ll take a look

 

Really, the first step is to check codes. Until you know what part is failing, you could waste a lot of money and time throwing parts at it.

 

Yep, it was the ABS/ESP control module on mine, for similar faults, dead gauges and limp mode (locked gear shift). The part alone cost me $1,300 USD, but they are cheaper online. I tried to have my original unit repaired by BBA, but the fix didn't work.

 

Hi Rudeney got the reading today error C1035 steering angle sensor any thoughts? Is it a diferent sensor than the abs or VSS?

 

OK, the ESP module is not getting a signal from the steering angle sensor. The steering angle sensor is behind the steering wheel. It is part of (or connected to) the "clockspring" assembly, which is what handles all the wiring from the steering wheel (horn, airbag, menu buttons) as you turn the wheel. The outputs of the steering angle sensor go through the steering column control unit and are then sent over the CAN bus and received by the ESP module. Since many other things are sent over the CAN bus to and from the steering column module and the ESP module, we can probably rule out problems with those units. My guess is that the steering angle sensor itself is bad or there is a problem with the wiring from it to the steering column control module. These parts are all 'stacked" inside the steering column. The airbag comes off first, then the steering wheel, then the clockspring/steering angle sensor, then the combination switch assemble (levers) and finally the steering column control unit.

 

Tks a lot Rudeney i ll try to remove the sensor first and may clean the contacts and check wires. Already called MB and a new sensor is around 350EUR lol. Hope it may solve this way

 

Be careful reinstalling the sensor and clockspring. There is a specific procedure to re-center it:

http://benzbits.com/w203/Clockspring.pdf

 

Thanks Rudeney i will be carefull just one more question could this error have anuthing to do with a wrong steeri g alignment? I think that my steering wheel is not 100% centered.

 

When an alignment is performed, they attach a weight to the steering wheel to keep it centered. Sometimes they don't center it well, or they allow the weight to slip when doing the work underneath. That in and of itself won't cause this error. A bad alignment can cause ESP problems, but your error indicates a problem communicating with the steering angle sensor - not an invalid position of it.

 

Tks a lot Rudeney yesterday a SoB hit my front left side while making a reverse in a one way street and drove away but i got his licence plate and saw the car on the orher side of the road called the cops and took pictures so i m waiting for insurrance to solve the problem and will try to include the angle sensor in the repair