We had become accustomed to only using the deadbolt to lock the motorhome and we each kept that key on our keyrings and the other full sets of keys in the coach. Took it in for service one time and after we paid and went to get into the coach, the "other" lock was locked. Bummer. We went back inside and a tech came out to look at the lock. He radioed back to someone in the shop and said, "Uh Dave can you bring a "D" key out to the motorhome in the front lot? That's when we found out there are a limited numbers of the same keys for that lock. The deadbolts are different however. We have also learned that this is common practice at service lots to only lock that common lock because they do have the keys for them.
Dale