Speed sensitive steering

DougMb

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Hi. Can anybody tell me if my 2006 Cls 320 has speed sensitive steering on it.
 

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Hi. Can anybody tell me if my 2006 Cls 320 has speed sensitive steering on it.
I expect so as it's based on the W211 chassis and my face-lift late 06 E320 CDI had it as standard.
 
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DougMb

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I expect so as it's based on the W211 chassis and my face-lift late 06 E320 CDI had it as standard.
Thanks for the reply. Its just that i had some mounts put on the car and ever since the steering is heavier at slow speeds and you need a bit of muscle to turn the wheel when its stationary. My son has a sl500 and you can turn the wheel with one finger.
Apparently you cant buy new solenoids for them so i've been hearing ?
 

M80

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Isn't there a plug on the rack that lightens the steering?
Has it been disturbed, or the cable to it damaged?
 
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DougMb

DougMb

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Isn't there a plug on the rack that lightens the steering?
Has it been disturbed, or the cable to it damaged?
Yea a speed sensitive soleniod.
 

mersum1es

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Rear speed sensor malfunction will stiffen parametric steering too.
 

M80

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Yea a speed sensitive soleniod.

I've no experience of working on these but seem to remember similar on my previous C320 (2005). So I guess it gets a signal from the ECU to lighten up below what ever speed.
'If' that is a signal applied at low speed can you check it's getting that when stationary? Of course if it's applied when above a speed that's more difficult.
And if it's a solenoid on the rack a multimeter on K ohms should check that for continuity.
 
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DougMb

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I've no experience of working on these but seem to remember similar on my previous C320 (2005). So I guess it gets a signal from the ECU to lighten up below what ever speed.
'If' that is a signal applied at low speed can you check it's getting that when stationary? Of course if it's applied when above a speed that's more difficult.
And if it's a solenoid on the rack a multimeter on K ohms should check that for continuity.
 
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DougMb

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I've booked it in at Halfords for one of their free steering tests now so hopefully the fault will show up on their diagnostic machine.
ive just been looking online for a new solenoid but although there is plenty on ebay i cant find one for my car.
 

M80

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Parts usually have specific number to identify them, that can often help to find one via google.
It might also help if you ring Mercedes parts dept with it.
 

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Parameter steering?
 

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M80

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Speed sensitive so less assistance the faster you go

Yep that's what my C320 had.
As a solenoid, as has been suggested to be on the rack, is on / off, it would suggest that the signal is analogue to a valve. Otherwise a sudden shut off of assistance would be felt.
 

mersum1es

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I put in my Vin number and got a list up but no mention of Speed sensors.

Of course you have speed sensors, VIN code tells if you have speedsensitive/parametric steering....
 

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