BOSCH SGS 5002 detergent compartment cover does not open during wash. Nor does moving the release lever open the cover. But the lid appears to have a strong-enough spring to slide open if gently jiggled.
Meanwhile, the machine works perfectly well with detergent tablets in the cutlery basket.
Is it worth repairing this machine of 10+ years – meaning, will it cost more than the machine is worth?
Check if the solenoid on the dispenser is working as it could just be a worn lid/slider and this can be bought separatly and price not too bad.
If the dispenser itself is at fault these are a bit more expensive and i would just continue to use it as you are just putting the tablet in the bottom! (remember not to use the progs with a prewash though eh!)