Can anyone help, I have a 1994 300Tdi, when travaling at 70mph the steering starts to wobble, as i slow down it gets worse. I had the wheels balanced, any ideas?
The first place I would be investigating is your swivel bearings and their preload.
On the front axle at each side there is a shiny ball-looking thing inside of each wheel. This is your swivel. Inside here are bearings top and bottom and need to tensioned using thin spacers called shims.
On the age of your vehicle it is likely that there is some wear in the swivel bearings so I would suggest you test for that before doing anything else.
To do the test do the following:
1. Jack up the front drivers side so that the wheel is off the ground, taking all security measures, like chocking a rear wheel, leaving it in gear and diff-locked etc.
2. While some sits in the drivers seat pressing the brake pedal firmly, grab the wheel at 12 & 6 'o clock and try rocking it.
If there is a little play then you may be able to reduce it by taking one or more of the shims out.
Now do the same on the other front wheel.
If there is a lot of play, it is likely that your swivel bearings need replacing. This is not an expensive job if you do it yourself as the parts are cheap to buy. It will take an average diy mechanic about 1-2hrs to do each side but it will feel loads better when done.
Do you have a Haynes manual, if not get one.
Here are some links which you may fine useful:
FRC7065DIS3KITNB Swivel Kit - no ball - front axle non ABS from JA032850
Good luck
Cheers
Dave