Malfunction after software update

I am compelled to express my utmost dismay and perturbation regarding the calamitous sequence of events that has transpired subsequent to the software update performed on my Mercedes-Benz GLC 250d AMG LINE (2017) at your esteemed dealership on 17 December 2025. Prior to this update, my vehicle was in impeccable condition, with no discernible faults or operational anomalies.

The software update, which I consented to upon reassurance of its benign nature and potential benefits, has precipitated a cascade of debilitating failures. The erstwhile reliable engine has begun to exhibit aberrant behavior, including the illumination of a yellow warning light, which was cursorily dismissed by your representative. Consequent to this, a plethora of issues have arisen, including the fuel gauge's inexplicable failure, sunroof malfunctions, and headlight system faults, none of which were extant prior to the update.

I find it incongruous that your dealership would insinuate the fuel gauge's potential faultiness, notwithstanding its flawless operation preceding the software update. The demand for R6,800 to merely assess the vehicle, followed by an unsubstantiated claim regarding the fuel gauge, is nothing short of egregious.

I hereby demand:

1. A comprehensive technical investigation into the software update and its deleterious effects on my vehicle. 2. Unambiguous accountability for the damages incurred. 3. Rectification of the faults at no cost, including restoration of the vehicle to its pre-update condition.

I await your expeditious response and resolution.