Body shops, in my experience, only need to remove or adjust a W124 door to replace a front wing if they are using a none genuine Benz panel. Having removed several W124 front wings and bought a car with badly fitting front doors with bodyshop front wings fitted, the doors adjusted to nearly their proper position by slackening off the hinge bolts and jiggling the door - a little jiggle goes a long way - but the body shop had also altered the position of the latch plate so that the properly adjusted door wouldn't shut until the latch plate was moved. The front wings of course didn't fit then, but Benz wings did.