Hello all, I am new in this forum, I live in the Middle East (Lebanon), we bought a 300CE 24V like 8 years ago and still with us from then. After three years, my dad decided to overhaul it entirely and we installed the 1992-93 hood, headlights, rear bumper and the license plate metal thingy.
We also upgraded the wheels and tyres from 15" to 16", and I found a set or (rare) red taillights and front diesel fender (air vent near the signal corner), so I thought it would look . And to wrap the thing up, we bought the Lorinser half wood half leather steering wheel with its airbag and automatic handle. The leather was also redone, half cream half black with the S500 design.

The car came from factory with Airbag, Auto, A/C, Headlight adjusters (from inside), ABS, Electric widows (all 4), Sunroof, Electric seats with memory, electrically adjustable steering wheel, etc...

Two years ago we dealt with two major issues: the car's computer and the engine really messing up. For the car's computer, my dad had the engine washed at the local gas station, it just didn't run again so we figured out that the computer was messed up and we had Bosch service center to install that of the 300E but the 5th gear is not shifting (we couldn't find another computer over here). So I need to ask what to do in this case? is there some "add-on" for it (that if someone had the similar problem) that will make the 5th work again?
And concerning the engine, well the old one cracked and the oil just got mixed with water, so we got some Hamburger sauce at the end . My dad replaced it with another one, but I am still afraid to loose this one also.

Sorry for the long post guys, Pls advise me what to do in both cases.

The reason you can't get 5th gear is because you don't have one.

On the second one, don't overheat the engine, watch the head gasket, and you should be fine.

Hehe, what do you call the gear which is above the 4th?
Well the 300CE 24 valves has 2-3-4-D, I guess the 2 has the first gear also in it, and the D is the 5th (or overdrive), isn't it?

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FiberGlass WIZARD

Middle aged six cylinder W140s and the 300E/TE/CE-24 were optionally fitted with a 5-speed automatic tranny (worldwide markets, maybe not in the U.S.). It had to be ordered under Code No. 425 and it costed about D.M. 4,400.00.

The infamous unit fitted to those models was the 722.5 which generated a lot of problems (more so than the updated 722.6).

That is why SilverSpear car have the sfhit pattern 2-3-4-D. The 722.6 introduced the pattern 1-2-3-4-D were 1st could be directly called. I would suggest a search under "722.5" to check on the problem.

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A. Rosich
CL 500, 1998
S 500 L, 1998
E 320 T, 1995 [Sadly sold ]

Sorry Rosich, I am a Subaru guy, I know a lot about them, my mom is driving the mercedes. What do you mean by the 722.5 ? and 722.6 ?
Pls help me out I am desperate to fix the fifth gear problem

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FiberGlass WIZARD

those are the transmission codes that mercedes used for them. the part number of your particular transmission will begin with 722.5 something something something. the newer ones have the other number.

so in looking for solutions for your problem, use the search function, enter 722.5 in he search and read through each thread.

good luck

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'O=00=O'
bmw 2002.
long live the legend

Thanks will do that... post updates later

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FiberGlass WIZARD