Avis

One of the most awful experience I’ve had renting a car anywhere in the world! I normally rent from Sixt and I think you truly get what you pay for.
I waited almost half an hour in line for an agent, and there’s only 3 people ahead of me, and 2 workers behind the counter. The queue was about 10 people deep, and the agents either didn’t have enough people to assist, or they really didn’t care. I looked next door at Sixt and they had plenty of open kiosks helping customers.
Finally I get to the counter and hand the girl my passport, credit card and license. She doesn’t say a word to me, enters my information, and hands me keys. Keys to what? I said what car did I get? We were hoping to get a Mercedes A Klas. Nope, we got a Citroen and it didn’t even come with GPS, so the girl had to go back and get me a Tom Tom GPS. Wow, that’s sad.
The girl points to the walkway and tells me to go over there to get my car. She said the stall is marked.
The car lot was HUGE and dark. Cars were flying by, and we had no clue where to find our spot. Found out it was on the OTHER side of the structure, squeezed in between 2 other cars. Did I mention it was dark?
No help available if you had no clue how to start your car. which it took me a few minutes to figure out. There’s no ignition or gear. You push the brake and then push a D button (not a gear shift) to get your car to drive. No help with the GPS, and in fact no one to help you navigate out of the area.
On the contract, they also add one additonal day to my rental, in case I was late. If you need to get a car, I would take the train to the city and then get the car there.
NOT worth the hassle with AVIS

I booked a car to be picked up in Singen and dropped off in Munich. I paid extra for one extra driver. I was given a total price, which seemed at the time competitive, so I signed the deal. Then when I turned the car in, they still tacked on a 25 euro additional charge, «one-​way» fee, allegedly because I turned it in at a different place than where I picked it up. But this is what was agreed on in advance. The contract specifically states:
* Airport surcharge and railstation surcharge are included on
rental days
* If vehicle is returned to a different station than agreed at
checkout a fee of approximately EUR 30 will apply.
But I did return it to the agreed station. This additional charge directly contravenes the contract.

Really bad. Waited to get a car, almost one hour. Waited to return the car twenty minutes. I mean come on. It is a huge airport operation after all. Get it together. Also had to show receipt to prove I filled it up. Apparently the gas gauge is insufficient. Think I won’t be choosing Avis next time.

schlange stehen mitten auf dem hauptdurchgang zwischen t1 und t2: nervt. opel als mietwagen bekommen: nervt. kurz angebundenes personal: nervt. in der konkurrenz der anbieter der klare verlierer gegen sixt oder europcar, zumindest am münchener flughafen.

When we hired the car I walked around it to make sure there was no damage. Nobody was present anywhere to ask/​check the vehicle.
Upon return, 3 members of staff decended upon us, going through the car with a fine tooth pick and registering a minute spec on the windscreen and a mark on the wheel rim of our Audi A4. I signed documenting that I did not cause the damage and was assured they would not charge us but make contact beforehand. Upon returning to the UK our credit card was charged with 1000 Euro (the excess), far more than the damage reported. After a lot of pressure, Avis reduced this charge to 95 Euro for the Windscreen damage only and agreed that the wheel rim was not damaged. If Avis want to charge customers for wear & tear, they should have someone attend at collection and tell their customers to allow an hour going through every part of the vehicle before they leave!
Be warned! I will use someone else next time.