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Registered 2001 SLK230
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61 Posts
Discussion Starter · #1 ·
We took our 2001 230 (WDB1704492F199242) for fluid changes to the best local shop on the island. Engine oil looked OK, radiator was low (turned out the expansion tank was cracked and leaking) and the auto transmission at 93,000 km looks like it had never been opened.

The shop removed the transmission pan, cleaned it, replaced the filter and o-ring sensor widget, and poured in the correct spec fluid. But the shop did not have a MB dipstick tool. Called the MB parts supplier in town who said fill it with 6 litres. Done.

Driving home, there was the smell of transmission fluid cooking on the exhaust pipe. Looks like 6 litres was too much and the autobox was overfilled. Parked it and ordered a dipstick tool from Hong Kong. Waiting for the package to arrive; a bit frustrated as the autumn weather is still glorious but soon the rains will begin (we are in the southern hemisphere - winter is in July)

Questions:

1) Does anyone know what the effect is of driving with overfilled tranny fluid? Does it hurt anything?
2) Out of curiousity, if the pan is dropped and emptied and the filter replaced, how much should go back in? Obviously not six litres.

Thanks in advance.
 

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Registered 2001 SLK230
Joined
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61 Posts
Discussion Starter · #5 ·
Why they took on the job without the correct tool !!??

They should of ordered the tool first then called you that they can now go ahead and book the car in .

So they ordered the fluids, rubber ring seal , filter etc but not the crucial dip stick :surprise::surprise:
No, I got all the supplies in the city before bringing the car over on the ferry, and the parts supplier said to measure out 6 litres and it should be OK. Turns out that was bad advice.

Living on an island in the South Pacific brings challenges with it that folks in America and the UK may not appreciate. I've ordered the tool and will probably give it to the mechanic, since it will be 40,000 km before I need it again... but he probably will not use it very often since SLK's are not very common hereabouts.
 

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Registered 2001 SLK230
Joined
·
61 Posts
Discussion Starter · #7 ·
Questions:

1) Does anyone know what the effect is of driving with overfilled tranny fluid? Does it hurt anything?
2) Out of curiousity, if the pan is dropped and emptied and the filter replaced, how much should go back in? Obviously not six litres.

Thanks in advance.

UPDATE:

I found this on the Crossfire Workshop Manual

EFFECTS OF INCORRECT FLUID LEVEL
A low fluid level allows the pump to take in air along with the fluid. Air in the fluid will cause fluid pressures to be
low and develop slower than normal. If the transmission is overfilled, the gears churn the fluid into foam. This aerates
the fluid and causing the same conditions occurring with a low level. In either case, air bubbles cause fluid
overheating, oxidation and varnish buildup which interferes with valve and clutch operation. Foaming also causes
fluid expansion which can result in fluid overflow from the transmission vent or fill tube. Fluid overflow can easily be
mistaken for a leak if inspection is not careful.

Presuming this is correct, we are waiting for the Dipstick tool so we can check and adjust before driving the car.
 
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