I have a 603 engine. The Car is an 85' 300D W124 Euro Version. Here's what I feel when driving: When I hit the kickdown/or even maually shift down - on certain slight uphill roads it does not work, but sometimes from 4th to 3rd on a straight away it does. I feel like there's not that much response from the tranny. I would like to have that sporty feel.
I have a 77' 300D and I can feel more response.
Do I follow the same steps you explained for my 603 engine?