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-   -   First Gear Start 1979 (http://www.peachparts.com/shopforum/showthread.php?t=418918)

vwnate1 01-15-2023 01:59 PM

First Gear Start 1979
 
Any links to the early non turbo Diesels starting off in second gear ? .

A guy I know insists all Mercedes four speed automatics start off in first gear, anyone who's owned one knows better .

TIA,

Sugar Bear 01-15-2023 03:34 PM

Don't tell him...you'll know something he doesn't ��

vwnate1 01-15-2023 03:48 PM

That wasn't helpful, he passed that stage .

vwnate1 01-15-2023 04:02 PM

From The Owner's Booklet
 
Okay ;

I'm trying to scan the pertinent page of the 1979 Mercedes' 300TD owner's manual P.45

It says " "D"

Drive all gears are available, 1st gear can only be engaged by means of kickdown .

Position "D" affords optimum driving characteristics under all normal operating condition ."

daantjie 01-15-2023 04:30 PM

3 speed starts in 1st. 4 speed starts in 2nd. You can make it start in 1st by shifting to L then back to D when parked then it'll start in 1st.

vwnate1 01-15-2023 10:57 PM

Thanx .

I shared the driver's manual info with him, we'll see what happens next .

I wasn't aware any W123's came with three speed automatics .

vwnate1 01-15-2023 11:02 PM

Tap Dancing
 
Nope ~ he now understands how it works but still refuses to say "I was wrong" .

Frank Reiner 01-15-2023 11:45 PM

Quote:

Originally Posted by vwnate1 (Post 4262795)
I wasn't aware any W123's came with three speed automatics .

They did not.

The 722.0 was used with V8s, was essentially the same box as the 722.1 & 722.2 (four speeds), but with a valve body that disabled 1st gear. Hence, it was referred to as a "three-speed"; 2nd, 3rd, & 4th.

vwnate1 01-16-2023 11:59 AM

Thanx Frank ~ :)

jsb357 01-16-2023 12:21 PM

my '79 starts in 2nd

JHZR2 01-18-2023 11:19 AM

I know this is a request relative to MY1979, but is there a listing of years/models that do/don’t have this? At least in theory as they were delivered.

None of my w123/124/126 cars do this.

I’m buying a 190D and the owner had his AT modified for 1st gear start, so obviously some of those did….

vwnate1 01-18-2023 08:43 PM

Mid 1981 model year was when first gear starts began .

INSIDIOUS 01-19-2023 01:31 AM

What is the other purpose of first gear?

vwnate1 01-19-2023 11:46 AM

The idea was to reduce fuel consumption as W123 Diesels were being sold to the upper class as economy cars, the price of Diesel fuel then was less than half of gasoline in the U.S.A. .

vwnate1 01-19-2023 12:53 PM

Apparently you've never driven one then as it does indeed start off in second gear make no mistake .

I had several of these and shifting into L for a moment whilst waiting for the red light started them off in first gear, you're correct in that they up shifted *very* quickly, within 30 feet or so but every little bit helped.


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