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1995 E320
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afaik, 722.5's were never sold in the USA on W124's.

re: overdrive, what that really means is rather dependent on the final drive ratio. the classic Laycock OD units used on british sports cars in the 60s/70s (and many older Volvos) were actually underdrives, when 'off', they reduced the output shaft speed, when 'on', they were 1:1, this was paired with a taller rear end ratio so the net effect was a taller effective gear ratio. classic manual 4-speed transmissions, the top gear was generally 1:1. later on, this all got soft, and calling something an 'overdrive' is rarely accurate on the technical level, unless you just mean a tall cruising gear for freeway speeds.
Many W124 coupes came with the 722.5, even here in the US.
 

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'92 W124 230E Auto
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One of my friends owns an '88 W124 300E (5-speed manual). Just the other day he was again telling me he was getting 10l/100km (23.5mpg), your 13l/100km (13mpg) at 145kph (90mph) seems a bit high, your revs at that speed are relatively low given your 5th gear.
 

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Discussion Starter #23
One of my friends owns an '88 W124 300E (5-speed manual). Just the other day he was again telling me he was getting 10l/100km (23.5mpg), your 13l/100km (13mpg) at 145kph (90mph) seems a bit high, your revs at that speed are relatively low given your 5th gear.
Are you referring to me and my post?
If you are and to clarify:
I don't have a 5th gear......I averaged 17.9 at 80, 85 and sometimes 90 mph.
 

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1990 Benz 300E 2.6 (mine) ; 1994 E320 Wagon (wife's) ; 1993 300CE Cabrio, needs some TLC
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7,348 Posts
18MPG going 80+ MPH is not at all surprising. if you cruise at 60MPH, you might get as high as a sustained 24 or 25 MPG. manual transmissions will give a few more MPG at cruise, offset by the fact that most people shift later when accelerating so in stop and go, you likely would get worse mileage than the automatic.
 

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1995 E320
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One of my friends owns an '88 W124 300E (5-speed manual). Just the other day he was again telling me he was getting 10l/100km (23.5mpg), your 13l/100km (13mpg) at 145kph (90mph) seems a bit high, your revs at that speed are relatively low given your 5th gear.
Lowveld or highveld? It can make a difference. (but not that much.)
 

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87 300D 5 speed
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5,611 Posts
offset by the fact that most people shift later when accelerating so in stop and go, you likely would get worse mileage than the automatic.
No, that's nonsense. The automatics used in the 124s lacked one crucial component. A lockup torque converter. That's why a manual will always have a huge advantage over the automatics in the 124. The 722.6 was a huge improvement in that respect.
 
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