I have a 1999 SLK230 and on the tempeture controls knobs the
> illumination lamp went out on the left knob. I talked with a mechanic here
> in my area (Roanoke,Va.) and he says you have to replace the complete unit
> which is over $300.00 not counting labor. After checking with the parts
> department I found out they offer the bulbs but again the mechaninc say
the
> unit is sealed and you can't put them in?? The parts person also said the
> parts number had been changed about 4 times. I purchased a bulb and was
> going to atleast look at trying to install it. Any help you could give me
> for this problem would be very helpful..