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MB Paul
MB Paul, Mercedes Technician
Category: Mercedes
Satisfied Customers: 4317
Experience:  Mercedes Benz Qualified Diagnostic Technician
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I have a mercedes c220 cdi year 2000. It is not going up the

Resolved Question:

I have a mercedes c220 cdi year 2000. It is not going up the gears . When I stop the car, take out the key and let it sit minute it will go ok 4 out of 10 times.. Any answers please
Submitted: 2 years ago.
Category: Mercedes
Expert:  MB Paul replied 2 years ago.

,


The transmission being stuck in 1 gear is an indication that it has gone into limp mode.


If the transmission is going into limp mode then it should have stored a fault code - the first thing to do is get the codes read on a diagnostic tool.


Also the oil level should be checked - there is no dipstick installed from the factory so a special tool is required (a dipstick! These are available from tool suppliers or also on ebay).


Check the transmission leaks - this transmission is prone to leaking from the electrical connector on the front of the transmission . If leaking from here then the electrical spacer & seals in the transmission will need to be replaced & the electrical connector cleaned with electrical cleaner.


A common fault inside the transmission is with the electrical plate - this usually shows up as a code transmission speed sensors. The valve chest needs to be removed .


Another possibility can be undervoltage fault codes stored – this is often down to a faulty battery. The battery should be checked with an electronic battery tester if undervoltage fault codes are present in the transmission ECU.


I would also recommend a transmission oil & filter change & inspect inside the sump pan signs of swarf indicating internal wear or damage to the transmission .



Best regards, Paul

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