Will this wheels fit?

Front wheels are 8,5 with et30. Compared to my existing front wheel (7,5 and et37), this new wheel will have an inner rim which is 10.7mm closer to the suspension strut. The outer rim will poke out 14.7mm more than before. Could be a tight fit but might work? I plan to go for tire size 255/35 19"
Back wheels are 9,5 and et48. Compared to my existing wheel. (8,5 and et30), this new wheel will have an inner rim which is 30.7mm closer to the suspension strut. The outer rim will poke out 5.3mm less than before. Here with 15mm spacers it might work?? Planing for tire size 275/30 19"
Will this work?
front: 8.00 width - ET 44 with 225-40-18. Very well fitted with the front wings, looks good.
rear: 9.00 width - ET 46 with 245-40-18. Too much in, too much space to fill. I've planned to buy larger tyres next time (265)
As I write it I realize my tyres shouldn't be with same walls front and rear

This car is a project that will go on for a year. The color is really nice looking but in bad condition. The car will need new front wings and a total repaint and some updates. I have done som projekts before som after 12 years away from Mercedes cars it is time to do some garage work.
Here is some of my previous mercedes projects
500E new painted
500E with Eissenmann exhaust
500E with R230 AMG wheels
300 TDT


