Just a little update for anyone who read this thread, it has been a few months and I did a diesel purge and changed the fuel filters again afterward because the mason jar of diesel purge was pitch black with lots of sediment at the bottom. It hadn't been done in 7 years lol, I couldn't really tell if this did any improvement to performance since I haven't driven the car that much after the purge, but it's still a very good idea to do a diesel purge as preventative maintenance and to hopefully restore some horsepower in an old Mercedes diesel.

However, something that really improved power was adding a quart of two-stroke oil to a full tank of fuel, I timed a 0-60 run and dropped 10 seconds, with a second passenger in the car who weighs close to 200lbs. I highly recommend as a little pick me up for an old Mercedes diesel to add some 2 stroke oil in the fuel tank for extra power if you can afford it. I really want to go after my injectors next since they are original to the car and are probably very worn out, and most likely causing a power problem. I also plan to go through the cylinder head one day and inspect the pistons and cylinder sleeves, but baby steps first!

I also think I will inspect my glowplugs and ream out any carbon since my car will lope and shake alot at idle when it is cold started (its winter right now and its ranging between 30-50 degrees F), but after running it at high idle for a minute it smoothes out. Reaming out the carbon can improve the operation of the glowplugs, fuel economy, and performance, from what I have heard, so I am curious to see if the claims hold up.