Hello fellow MB owners,

I need a little help...I have a 2005 C230 and have lately noticed that the car takes 15-20 minutes to get up to temperature, where previously, it took just a few minutes. my gas mileage has also suffered.

I purchased a new thermostat but haven't installed it yet. I was hoping to get some advice from the forum prior to doing so.

Any assistance is appreciated!

Thanks!