I have a 300SD. 1982. I just traded it for 600 bucks and an L24 rebuilt motor.
Oh yeah, I know lot's about these cars. Just AIM me or quoc@livesockets.com. I'll be glad to help, as long as you can help me on my Z.
I ran my 300SD for about 7 years, never had to do anything to the car except change the darn oil. Also, we have two W126 Diesel Chassis and about 2 cars in adition to that worth of parts, i'm in southern california.
Our family has, 2 W126 Convertables, 1 W126 500SEL, 4 W126 300SD, and a 98 TURBO DIESEL E300.