I wonder if anyone can give me some advice on a 1991 240 with 162 000 km
(100 000 miles).  When I braked I could feel a pulsating from the front end
and on the steering wheel so I had the rotors replaced...but it still feels
the same.  Could it be the tires are out of balance?  Any ideas?
   The second problem is with the automatic tranny.  It doesn't always
shift into overdrive even at 30-35 mph.  It used to shift fine but now I
notice that it often needs to be kept at a steady speed and over 35 mph
sometimes 40 mph before it shifts.  If I press the button on the shifter to
overide overdrive-no change in rpm noted so its still in 3rd-then press it
again, it will shift.  I was told that the trans fluid needed to be flushed
along with a new  filter and that could possibly be causing the shifting
problem.
   The other problem I've got is with a leaky head gasket.  You can see the
anti freeze on the outside coming from the head but no white smoke coming
from the exhaust.  It appears that the gasket is shot on the outside but
still ok around the cylinders.  Is there a danger in not changing the gasket
ASAP?  By the way, how can I tell if the head needs to be machined if I do
decide to replace the gasket?  Any pitfalls I should be aware of?  Thanks
for any advice...Paul