89 300SD any help
 

Error in year it's an 83
Hello,
I am looking for any and all help or advice or insight to my new part of my life. I cannot find much info on this vehicle.
So far I am battling a few issues
1. Pasanger side window switches work sometimes
2. Gas door has to be manually opened
3. Sluggish take off but tons of power when turbo kicks in.
4. Tachometer doesn't work

I discovered that lol its an 83 300sd. Typo on the registration.

Thank you for the input.