Here is the troubleshooting guide and video for leaking dishwashers from Sears PartsDirect: searspartsdirect.com/diy/article/dishwasher-leaks-video
1) Check door seal, spray arms for damage
2) Check water supply line, drain hose
3) Examine heating element, pump and diverter motor
Your model should have one digit after the MDB4949SDE. Double check your full model number, and here are all models on Sears PartsDirect: searspartsdirect.com/search?q=mdb4949sde
You can find parts, diagrams and your owners manual on Sears PartsDirect, model MDB4949SDE0: searspartsdirect.com/model/26q5oej980-003048/maytag-mdb4949sde0-dishwasher-parts
If you can't find the leak or you'd rather have a professional repair, you can call Sears Home Services at 1-800-4-MY-HOME for repair.
Decibel Level dBA: 50
Maytag has discontinued this model. The replacement model for this Maytag was also discontinued. Here's a replacement Kenmore model, also 50 dBA: sears.com/kenmore-24inch-built-in-dishwasher-w-stainless-steel/p-02213229000P
Both the Kenmore model and your Maytag are made by Whirlpool.
All dishwashers: sears.com/appliances-dishwashers/b-1020017?searsTab=true