If for a large part of its life it was parked in an outdoor parking lot during the day where only one side of the car faced south and the other north, then it could very well be sun faded, doesn't matter if it was garaged with hatty or how you have parked it, the prior 15+ years to that are unaccounted for.

__________________
-diesel is not just a fuel, its a way of life-
'15 GLK250 Bluetec 118k - mine - (OC-123,800)
'17 Metris(VITO!) - 37k - wifes (OC-41k)
'09 Sprinter 3500 Winnebago View - 62k (OC - 67k)
'13 ML350 Bluetec - 95k - dad's (OC-98k)
'01 SL500 - 103k(km) - dad's (OC-110,000km)
'16 E400 4matic Sedan - 148k - Brothers (OC-155k)