the reservoir neck at right rear of engine near firewall
 

Question, I was noticing that the reservoir neck near right rear of engine where in past older models would use for adding transmission fluid, it doesn't have a cover with a red tap that restrict owner from adding fluid, does a cap suppose to cover that neck? Dealer had my vehicle for service for over three months and just today after getting it back i happen to look under hood and noticed this neck uncovered. 2003 SL 500

That is where the dipstick would be but on the MB's there is no dipstick. The rational for this is the computer will tell you when to add oil. You can buy a part from MB at a ridiculous price that will act as a dipstick but it is not permanent and must be removed once used:crazy::crazy:

thanks Lou, this dealership is notorious for servicing your car and leaving parts off during reassembling.