osf,wheel receding back to mudguard/ 300E SALOON

[souness]

front offside wheel is nearly touching mudflap. When going over roadhumps,bumps on the road osf-wing hits the tyre. The nsf-wheel
has same gap at front +rear of wheel arch - Where as osf wheel arch, there
is a small gap at rear of wheel arch +large gap at front of wheel arch
SCARED TO DRIVE THE CAR EVEN TO A GARAGE ,WHAT CAN BE
CAUSING THIS