Thanks mersum, I don't know but maybe someone else here can explain how it works? My Techie said 'no faults stored' so I assume it doesn't need calibrating? But again, I'm not an expert in these things. All I do know is that the damping is still quite hard. It's a real mystery!If sensor reading is 'outside' range, shouldn't system try to correct it back to calibrated values? Has calibration done (succesfully!), to which values? Both rears are too high (or too low), readings L/R go opposite direction...
Good question(s) wally - maybe Dave2302 will know the answer. It did occur to me to fit a new rear height sensor just in case (I've replaced just about everything else!). I don't think they are expensive in the big scheme of things."Not being hampered by facts, I can discuss the matter freely." Cecil Stockard, Sr.
"But for rear axle level sensor (B22/3):
Signal 1: 2.18 (specified value 2.30 to 2.70)
Signal 2: 2.84 (specified value 2.30 to 2.70)
He explained that although slightly out of range, the differing values should compensate for each other."
Fact: There is one height sensor for the rear suspension.
Facts (?); There are two simultaneous signals sent from the rear height sensor. (?) Neither signal is within programmed limits. (?)
Question: Does the control computer actually average the two sensor readings and use that average value as the height signal?
Or does the control computer say, "I have no idea what the height is on the rear suspension, so I am going to the fail-safe status."?
I don't have a clue whether either situation is reality...
How much does a height sensor cost?
Yes that is exactly how it works ...................Does the control computer actually average the two sensor readings and use that average value as the height signal?
Thanks Sonny, you and Deplore are probably right. I did ask them to do 'on the move' / streamed data: but to be honest I'm not sure if they did that in the end (probably too much time and labour involved if they are trying to save me costs?) The price for 2 Hours' inspection / SDS was only £140 GBP so I'm not unhappy about that. And it's been HOT HOT HOT here: so maybe I wasn't 'on their backs' (supervising them) enough for the same reasons?Hi Mark,
Deplore is right. It is worth driving around and having the car hooked up to an SDS watching the values. I did that when I had my issue but everything checked out in my case and it didn't help but in yours it might. Just bring it up with your mechanic and see what he says...
Ha ha - Mercedes 'S' Viagra! . You Finnish people have a great sense of humour (In fact I have visited Finland on business and the Finns are lovely people)Yep, like stated before, 'rock hard erected up' car can be result of viag.... no but failed accelerator sensor. BUT that should trigger a code, or seen in live data. And ADS wires are prone to fail. I just can't remember if open circuit means hard setting (AND IMO ADS should never go rock hard even at most sporting setting - why acc sensor fault is having hard suspesion is becuse struts are driven at upper ends).
MB's are 'Sonderklasse', thats why 'regular' mechanics won't do...
Thanks Deplore, that's VERY helpful!.At this point you might need to go OEM route and do what engineers do.... Get 8 channel oscilloscope, probe all four acceleration sensors and graph them and compare to what SDS is outputting.
Or start measuring wire resistance from all accelerator and level sensors to the airmatic module, . Should be less than 3ohm, cold or hot.