Quality Spark & Offer Let’s Party 100

Hello, my grandpa is interested in the Spark, since he saw the financing offer in the newspaper. We really like the car from the design, but what about possible defects, a vulnerable car or totally problem-free? In the configurator I didn’t get out completely, so there is the Spark + only with 68 hp, instead of 82 and without climate? Because he should already have 82 hp and climate. The offer includes the Spark + with 68 hp and without climate for 99 € per month. Month for extra costs arise if we would take the LS + for 250€ more. Thanks in advance