C180 Steering 'groan'

[TMatt]

My C180's steering makes a slight whining/groaning noise on the first couple of corners I make at the start of the day - usually round a fairly tight roundabaout. My guess is that it's probably the power steering fluid or belts, but can anyone advise where to check (other than going to the dealers).

 

[tom7035]

I would try bleeding the power steering system. Jack up the front of the car and with engine off, fill the reservoir to about a half-inch from the top. turn the steering full lock to lock several times, topping up if necessary. Then have someone else start the engine while you keep an eye on the reservoir and be ready to further top up as the level may drop quickly. Finally, with the engine idling, turn the steering about a quarter turn in each direction several times. Switch off, allow to cool again and do a final top up to the max mark. This procedure should clear any air from the system.
Let us know if this helps.
Cheers, Tom.

 

[TMatt]

Thanks Tom - sorry but I've only had the car a few weeks and don't have a workshop manual - can you tell me where the reservoir is located? Thanks.

 

[tom7035]

Front of the engine to the right as you look at it, above the drive pulley. I think there were two types of pump, but both are similar. Should be a knurled plastic nut on top for access to reservoir.
Should also use special MB power steering fluid, though I use ATF in my W124 'E'. (Which was always pretty standard in power steering systems).
Hope this helps, but it would pay you to acquire a manual for future reference.

 

[TMatt]

Thanks Tom, much appreciated.

 

[stever]

I had exactly the same problem in my w123 - the problem was a slightly low level in the power steering reservoir - it expands as it warms which is why you notice it when the car is cold.

 

[TMatt]

Thanks guys - took your advice and problem solved.