Gearbox. R172 SLK.. Is it possible to change from a 7 speed to 9 speed auto without any problems? many thanks

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MoDslk

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Dec 1, 2021
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Location
bristol
Car
SLK 250cdi
Gearbox. R172 SLK.. Is it possible to change from a 7 speed to 9 speed auto without any problems? many thanks
 
I am sure anything is possible with enough time and money but why would you want to do this?

The cost of the gearbox ,transmission control unit, other modifications etc would make it financially unviable.
 
buy a 9 speed far cheaper and re saleable.
 
I wouldn't bother. The 9 speed box in my SLC is an improvement on the 7 in my SLK but no way is it better enough to warrant changing.
 
I wouldn't bother. The 9 speed box in my SLC is an improvement on the 7 in my SLK but no way is it better enough to warrant changing.
This. The nine speed box is superb and always finds exactly the right gear but the seven speed is excellent too.
 

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