2003 W168 A210 Auto - gear holding in gear

[CharleyNokia]

Hi guy, got a problem with my auto box on my 2003 A210 auto. The gearchange up from 2 to 3 holds in 2nd for a 3-4 secs before changing up to 3rd. Is this fixable with a gearbox oil change or is it unfixable? I'm told it may have an ecu, so could the ecu be at fault? Damaged gearbox?

To add, there is NO F light on the dash, the car drives fine apart from the slow/holding gear from 2nd to 3rd.

 

[BlackC55]

Hi guy, got a problem with my auto box on my 2003 A210 auto. The gearchange up from 2 to 3 holds in 2nd for a 3-4 secs before changing up to 3rd. Is this fixable with a gearbox oil change or is it unfixable? I'm told it may have an ecu, so could the ecu be at fault? Damaged gearbox?

To add, there is NO F light on the dash, the car drives fine apart from the slow/holding gear from 2nd to 3rd.

It needs to be plugged into a star firstly.