Spark plugs at 35K miles?
Any ideas?
Last edited by jr_vette; Sep 24, 2007 at 08:34 AM.


Does the car service sheet say 5 years? Perhaps it has been changed?
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- The 100,000 miles/5 years for replace spark plugs came from Konigstiger's 211 service sticky post.
- I am not sure how to determine the build date (I bought the car used), however since it's a 2004 model I have to assume it was built sometime in the fall of 2003? ie, less than 5 years ago.
- I am scheduled for Service F as well. Taking another look, there are some other questionable items same as noted by gnma.
Re-reading of Konigstiger's post seems to say some of the FSS items are in fact "due when displayed", which would indicate it depends on how you drive, while others it seems are due based upon miles or years. So, my question remains: why am I seeing service items due soon that appear to be based upon miles/years when the car is apparently not that old and hasn't been driven that many miles? Replace plugs is 100K miles/5 years, replace fuel filter and charcoal filter are both 60K miles/5 year items per Konigstiger's 211 service post. I will also ask my service manager and see if he as an answer and post back.
Thanks again to all.

Consider rpm/2*total run minutes= total # of times each plug fired. I would expect given a good engine and normal cooling system and fuel that run time on the plugs would determine the change. If you pulled the engine and put it in a piece of farm equipment most on run hrs alone for plugs, not time.
SO I would not change them. But my E500 has 72,000 miles on the origional plugs and I might change them next year. The charcoal filter is constantly exposed to the atmosphere adsorbing contaminante into the activated charcoal and that might be possibly changed on time. The air filter,, never time,, run hrs equates to scfm of air pulled through the filter. If there is no air flow (engine not running) the filter is not loading up with contaminates. Oil however might ? deteroriate depending on additive package but I have run cars that sat for 3 years with clean oil the full mileage after start up. So each item can be considered for form and function with some judgement to determine if it should be changed on time alone. Just another $.02.
I'm in the same boat as the original post. I have a Serv. F due in 15 days and what is your recommendation? Do I tell them NOT to replace the plugs, fuel filter, and other items that MB recommends to be changed much later? I can't see them saying "ok". THis is a golden opportunity for them to say "we gotta go with what the car asks for" and bill me $$$. (I have a '05 E500 and 32K miles), and there's no way my car needs new plugs, or a fuel filter. If they are honest (yeah right), and do the basic required service, will they reset the items not needed? Again, I'd love to DIY, but while the car is under warranty, I'd rather have MB service her.
As always, thanks.
I'm in the same boat as the original post. I have a Serv. F due in 15 days and what is your recommendation? Do I tell them NOT to replace the plugs, fuel filter, and other items that MB recommends to be changed much later? I can't see them saying "ok". THis is a golden opportunity for them to say "we gotta go with what the car asks for" and bill me $$$. (I have a '05 E500 and 32K miles), and there's no way my car needs new plugs, or a fuel filter. If they are honest (yeah right), and do the basic required service, will they reset the items not needed? Again, I'd love to DIY, but while the car is under warranty, I'd rather have MB service her.
As always, thanks.
I would have a list from the FSS and cover the specific items that are needed and follow MB recommendations from the FSS with exclusions as I covered before. I would not change the plugs at 35K,, not on a MB with the 100000 mile long life plug. Just the plugs will cost you about $200 and dealer labor at $100/hr, will set you back another $200 or so,, therefore your plug change will cost you close to $500. The car will be out of warranty at the 100000 point and you can do them yourself. Don't buy what you don't need. If they tell you the warranty won't be honored if you don't change the plugs at 35K miles show them the MB maintenance list.
Do you have the service listing for each item vs mileage?
Do you have the service listing for each item vs mileage?
2 weeks ago, I had a "serv. F due in 4,xxx miles." Last week, I started her up, and it said "serv, F due in 25 days." (Don't understand that, but anyway),
I have a number of items that come up on the FSS, of which I describe below to be questionable. I have also listed the MB recommended replacement time/mileage (from my maint. book), next to each item I have below:
Item 5 - Replace Fuel Filter - every 65K or 5 years.
Item 6 - Replace Activated Charcoal Filter - every 52K or 5 years.
Item 7 - Replace Spark Plugs - every 91K or 5 years.
Other items include oil/oil filter change, ck. brakes etc., which seem more appropriate
I hear what u're saying about showing the dealer the MB recommended intervals, I guess I will take that approach. Thanks for any help.
The net sum of all this for me is that for a 2004 E500, FSS is worse than useless, it is misleading.
US Service 4 @ appro every 30,000 miles or 2 yrs
Egine compartment
8381 Replace dust filter
US Service 9 every 2 yrs
9850 Check bodywork for paint damage
Underside of Vehicle
0900 Chasis and load-bearing body components: Checks for damage and corrosion
Engine compartment
4281 Replace brake fluid, check preload pressure of pressure reservior
US Service 10 every 5 yrs
Passenger compartment
7731 Sliding/pop-up roof: Clean slide rails and shoes
US Service 12 due when displayed in multifuction display
Engine compartment
0101 Engine - oil and filter change
US Service 13 due when displayed in instrument cluster
A whole bunch of checks
1. battery
2. windshield wiper
3. blah blah blah
But my whole point is each car have it own mind. Depend on the weather, road condition, and so on. My car mostly used on the highway about 80% of the time. Therefore, mine is different from your and your is different from mine. It's really all boiled down to how much are you paying for the service? The dealer quote is ranging from $290-$490...I'll find out next month when it reached 39,000 miles that is what I'm thinking when the service is due. I'll keep you guys posted.
Last edited by E500Newbee; Jan 28, 2008 at 11:16 PM.
cgcedisto:glad to hear your dealer worked with you. I hope mine will do the same, bec. I am NOT changing plugs, fuel filter, with only 32K on my '05 E500. (Thanks for the advice vettedvr). Did they reset your FSS correctly?


