Hey guys,

I just bought this car, and the ac display is going out, and if i tap it , it comes back on.. any suggestions?

 

 

replace the ac control head

 

Is that what the part is called?

 

ATC Control panel. No need to buy new if you are handy. These are nototious for solder joints that fail and can easily be repaired. Or there is a guy on ebay thet sells repaired ones for decent $$
http://300mclub.org/forums/viewtopic.php?f=10&t=12363

 

Will this also cause all the display lights, including the odometer display to dim and flicker sometimes?

 

nope separate issue

 

That "seperate issue" is often called the "light show" common to LH cars.
Roll the "dimmer" wheel full teavel a few times and set it just below max brilliance. If it still occurs, there was a "fix" when these cars were new.
Disconnect/reconnect the wire harness at the headlight switch a few times. Finish off with a little dielectric grease on the contacts.
Recommend you do not waste any more time here at this site. If you want real help visit www.300mclub.org we welcome all espically LH cars with real help and good advice