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05-15-2012, 08:21 AM | #1 |
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Mercedes benz 450 hp problems
what kind of milage are you getting with your renegades or others with this engine.\?my is a 32 ft tandem & 40 ft stacker 55000 lbs gross 4.5 mpg. i havr a issue with the fan coming on at 75 mph on warm days for about 20 seconds at about 210 degrees temp drops to 190 within 15 seconds. two dealers have give up & said this is normal,it did not do thid when new. i have replaqced the thermosats twice one water pump & one radiator for nothing. thanks for any info mark young 919 427 2747
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nitro joes TOP GUN 3 years straight mark young |
05-15-2012, 11:55 AM | #2 | |
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Re: Mercedes benz 450 hp problems
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Chuck |
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05-17-2012, 09:12 PM | #3 |
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Re: Mercedes benz 450 hp problems
Thanks for the info. The fan is annoying though. What do you think of the mpg difference? My truck 12 speed autoshift & 3.58 gears 11.22.5 tires
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nitro joes TOP GUN 3 years straight mark young |
05-18-2012, 10:41 AM | #4 |
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Re: Mercedes benz 450 hp problems
My Haulmark does it too (I have a Cummins) and it drives me nuts sometimes. They have looked and looked and still cannot find any problems and said "It must be normal but it does not seem right". As far as milage when I first got mine I thought it was going to kill me in fuel and regretted my decision. Now that I have just 14K miles on it the fuel mileage has almost doubled. I hoping with 4 dollar diesel by the time it gets to 30K it doubles again LOL.
Last edited by Rob Petrie E395; 05-18-2012 at 10:49 AM. |
05-23-2012, 10:36 AM | #5 | |
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Re: Mercedes benz 450 hp problems
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06-09-2012, 12:12 AM | #6 |
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Re: Mercedes benz 450 hp problems
Thanks guys for the advice. Anybody else have any ideas on my fuel milage 4.5 mpg or the fan . Please help thanks mark young
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nitro joes TOP GUN 3 years straight mark young |
10-23-2012, 12:59 AM | #7 |
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Re: Mercedes benz 450 hp problems
it would seem my 358 rears gears are causing both the fan problems and poor fuel mileage. a freids truck has 3.21 ratio. what do you other 450 mercendes owners have for gear ratios? i drive at 80 and max speed is 83 engine is maxed out a lot of times on open interstates/ my truck has mercendes axles that donot offer anything between 2.40 and 3.58 thanks for any imput.
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10-23-2012, 12:56 PM | #8 | |
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Re: Mercedes benz 450 hp problems
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10-26-2012, 08:26 AM | #9 |
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Re: Mercedes benz 450 hp problems
Thanks mike but i mite git rearended at that speed!!!! What gear ratio does yours have? Thanks again
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nitro joes TOP GUN 3 years straight mark young |
10-27-2012, 12:16 AM | #10 |
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Re: Mercedes benz 450 hp problems
I've got the answer, Try driving past a state trooper @ 80mph towing your trailer!!!!
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