Funny thing happened tonight. When pulling into my driveway, the steering suddenly started hammering back at me and I was unable to turn the wheels. Felt similar to anti-lock brake pulsing.

It was pouring with rain and I had just gone through a very large puddle...

After sitting for about 15 seconds, I was able to turn the steering wheel again and park the car.

Any thoughts on this? I tried searching the forums but drew a blank.

1989 535i
5-speed manual
245000kms