I replaced a bunch of cracked vacuum tube connectors. That's it! The wagon was shifting hard so I went through and checked all the vacuum connections for leaks. Some connectors broke apart in my fingers. Not only did the shifting go smoother, the mileage took a nice bump!

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Peach Parts W124.128 User Group.

80 280SL
85 300SD
87 300TD
92 300D 2.5 Turbo
92 300TE 4Matic

Sweet

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I choose to be happy, even when the Mercedes is being awkward, lol

I will need to do this, right now mine doesn't shut off without popping the hood open. I know it's likely bad lines causing leaks. I guess I just need a big bag full of new rubber unions.

I can help you with this.

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Peach Parts W124.128 User Group.

80 280SL
85 300SD
87 300TD
92 300D 2.5 Turbo
92 300TE 4Matic

Wow, I have never gotten more than 28 from my wagon in any driving circumstances. I average 25-26 (and that is without AC). This has been the case for 40-50k. Vacuum lines have been gone through and are intact as far as I know.

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1987 300TDT - 195,000 (Original #14 head)
1993 190E 2.3 - 105,000
1981 300D - 250,000

How long has it been this level? I would like to know how long it stays how many tanks you make it over. 30.1 MPG is near impossible that heavy wagon for any sustained time.

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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!

I get 25 mpg in mostly city driving and 34 mpg in mostly highway driving in an 1987 300TD. These are real, verifiable numbers over several tanks. I describe a couple of these tankfulls here in post 87:
Realistic MPG in 300D's, 300SD's, 190 D's?

Next, I plan to switch to synthetic oil to see if I can squeek out another mpg to get 35 mpg highway.

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1968 220D, w115, /8, OM615, Automatic transmission.
My 1987 300TD wagon was sold and my 2003 W210 E320 wagon was totaled (sheds tear).

My last two tank fulls were 29.1 and 29.7, respectively. :-)

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Peach Parts W124.128 User Group.

80 280SL
85 300SD
87 300TD
92 300D 2.5 Turbo
92 300TE 4Matic

How confident are you in your odo?

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1984 300D Turbo 350K 50K WVO (two tank) "Maeby"

The speedometer is spot on. Next long trip I'll validate the odometer, but for now I've no reason to question it.

I should also mention that I'm running 195/65-15 Michelin XVS+ with less that 2,000 miles on them, and they are properly inflated. I do not have the roof rack cross bars installed. The air conditioning is NOT charged, so there is no drag from the A/C compressor, but that means the windows and sunroof are generally open.

Finally, I replaced the leaking transmission vacuum control module just before the last two tank fills, plugging what I believe was the last vacuum leak.

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Peach Parts W124.128 User Group.

80 280SL
85 300SD
87 300TD
92 300D 2.5 Turbo
92 300TE 4Matic

Tank fills, are the only way to determine what your car's mpg is IMO.

My '06 E320 CDI's on-board computer registered; "40.1 mpg" on it's maiden voyage from San Antonio to Dallas, Texas. That's the good news. The bad news is that an RT (round trip) to the taco stand .75 miles each way from my home, yields 18 mpg in the car. The city driving is yielding 24 mpg. The moral of the mpg story is that any isolated mpg reading is just that - isolated. Real world, out-of-pocket costs to replenish your fuel tank(s), unfortunately, are not based on your best mpg reading(s). When some joker claims his '99 E300D yields; "43 mpg" here on-forum, I just laugh at it. My same car has never yielded over 32 mpg under any circumstances per tank fill-up. The car is not capable of; "43 mpg." End of story.

Likely climate control vacuum pods also.

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85SD 240K & stopped counting painted, putting bac together. 84SD 180,000. sold to a neighbor and member here but I forget his handle. The 84 is much improved from when I had it. 85TD beginning to repair to DD status. Lots of stuff to do.

My engine bay is running out of vacuum hoses. I only ones I have left is the engine shut off, brake booster and climate control hose.

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CENSORED due to not family friendly words