Was wondering, we have an 08, could dirty battery cables cause the engine to hesitate? Today my fiance had to stop at a red light, and the car didn't want to go. He backed up a bit and then it was ok. Being an 08 it's possible the battery terminals are getting corroded a bit. Just wondering if it was possible and if others were experiencing the same thing? Thanks, Nancy

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Hi, Nancy.

Typically, we do not expect corrosion on the battery terminals to cause hesitation. Corrosion can cause slow cranking, flickering of lighting, or other charging issues. 

Hesitation could be caused by a number of issues such as fuel, electrical or mechanical.

Hard to diagnose on the Internet.  How many miles on the car?  Has it had a new set of plugs (every 30K miles)?  Possible bad batch of gas (stick with 91 octane Top Tier brands.)  New air filter?  Any OBD codes?

It's around 37,000 miles, and I believe when we did oil, he changed all but plugs. We only use hi test, I forgot once when we 1st got it and used regular, my fiance blew up!! I don't know about the air filter, and nope, no codes. We did oil right away, we don't believe in 10,000 miles between so it will probably be changed at the next 3,000, then maybe he'll let it go 5,000. It just started the other day, and we've had the car since Feb. Also new tires, even though that has nothing to do with how it runs. Thanks for your time jwight.

Also found out, that the oil on the market doesn't hold up to the high heat these engines are under. That's why we got the oil from Mercedes. Our mechanic was going to use regular hi performance oil, but found that out when he called the company. 

Nancy... The MB dealerships in FL use the same Mobile 1 synthetic that you can buy at the local autoparts store. Sounds like the dealer is taking advantage of you. I'd defiantly check the air filter (again, get one on amazon... they should be around $12) and plugs (www.smartmadness.com).

Nancy Gale said:

Also found out, that the oil on the market doesn't hold up to the high heat these engines are under. That's why we got the oil from Mercedes. Our mechanic was going to use regular hi performance oil, but found that out when he called the company. 

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