M-bENZ

Thank You.

Andy

vettdvr

takitoz71

Check your email I sent you the info.

merc687

i have 60000 miles on my car but its 5 yrs old so i am planning on changing them...so its E320...does that mean i have to only buy 12 of them since its 2 per cylinder. and is it a diy job ....
thank you

vettdvr

Yes. Check your owners manual for type.

UsedMB

I heard spark plugs often have improper gap coming out of the box. Might want to check/re-gap before installation.

vettdvr

The MB plugs come pre-gapped. If you regap it is possible to crack the tips. I never regaped the Bosch MB plug they were correct out of the box.

UsedMB

... might want to check the gap anyway. I suppose you can always return/exchange the bad ones if you don't want to risk cracking the tip.

ruffrob

Gonna get mine done ,tomorrow At almost 63K on the odo,gonna do them ,oil (Mobil 1 0w40) and check the tranny,power steering and anti-freeze. Like Benzo said ,the car runs great,but I always say proactive maintenence ,is better than reactive repair...

n0n0tme

Make sure that the sparkplug is gapable (is that a word?) Last time I tried to gap a spark plug I didn't read the box. It said not to gap because it will damage the platinum tips. (This was on an Infinity plug were NGK). If you use reg plat plugs from bosch they might work but if you use plat +2 or +4 you can't gap them..

Oh yeah where can you get these plugs(#7422) for $5. I've looked in some sites (kragen and autozone) and they are selling for $12.00 a plug. Please post a link on where to purchase that cheap!!

john in norcal

Is it necessary to change the plugs after 5 years, as the maintenance booklet states, if the car has low miles? My car has only 21K miles but will be 5 years old next year.

Benz-O-Rama

Bosch 7422 ($4.37)

http://www.autohausaz.com/search/pro...2@Spark%20Plug

vettdvr

At 21K miles the plugs are not worn out. I would only be concerned about the plugs seizing in the heads. So I suppose you could remove the plugs and reinstall but that would seem like wasted effort if you didn't install new plugs @ $5.00 or so each.

So if you aren't concerned about seizing leave them. If you are change them. From a driveability they probably are ok for a while longer.

I think the probability of sticking is low. I just changed our E500 plugs 2003 last month at 85,000 miles and they were relatively easy to change with no issues.

So it is your choice.

vettdvr

Correct, same plugs I put in our E500 2003. Plus if I remember correctly I got free shipping also. I bought a new fan belt and idle pulley so my order was a squeek over $100

john in norcal

In that case, I'll probably wait until year 6 to change the plugs. Thanks.

vettdvr

I think you are good to go more time. At 85,000 my plugs still looked like new plugs.

ruffrob

But you still changed them,right?? I guess because the material used to manufacture them,they don't show considerable signs of wear.... Wonder how long you could go before you HAD to change them?? Not that I would put my car to that kind of test ,mind you,but just wondering.....

vettdvr

As my hair turns gray and loose I have learned.

I will never pull a plug out at 85,000 miles and not replace it with new!. So yes I did change them.

85,000 really is not abusing the car or plugs. Check your manual for your plug frequency. The service dept at the dealer told me to wait until 100,000 miles. My guess it that 85,000 based on my driving was a bit too early and a conservative change.

So if you want to change earlier feel free but if it were me I would not change them early. I would reco you just follow the MB manual for the plug change freq. I think 85,000 was a good time for me to change them.

BoughtaBenz

I think that changing the plugs around five years is because the Platinum loses some of it's ability to conduct electricity. The color just shows that your tune/air fuel ratio is on or off the money. I do understand the plug color stuff and the tuning aspect, just don't know much about the conductivity of platinum!

That's what I understood, but there are quite a few people on this forum smarter than me, but it made sense.

Did you Guys change your wires too?

Thanks for posting this up because my dealer told me that it would cost $1900 for plugs and wires! I asked him if that included dinner and a movie too!

Thanks again!

Benz-O-Rama

Unless you're car is mis-firing, don't even worry about the wires.

vettdvr

I would expect the dealer charge to do the plugs on a V8 /16 plugs to be around $500 to $600 in the OK range. For $1900 you should get perts.

Actually the $1900 was probably for the 100000 mile full service with all the checky checks.

FreddyG

Thanks Guys!

As far as perks, I'd rather have the money! You've Never seen my service advisor!

Are they wires on the plugs or are the coils attached directly to the top fo the spark plugs? I talked to an Independant today that said the coils were directly mounted on the plugs. I've never seen them, that's why I ask. The answer to this question will tell me if I want to use that Ind or run as quickly as possible the other direction!

vettdvr

No the coils are not on top of the plugs as in fords. They are mounted on the valve covers with wires. PM me your email and I will send you the information you need.

FreddyG

So, they're like on the Corvettes?

Pm coming your way!

Thank You!

vettdvr

Ok got to laugh on that one. They are designed similar to the corvette with a coil for each cylinder and mounted on the top of the valve cover. But they don't go Varooooooooooooooooooooooom like my corvette does on the track back straight away.

007_e350

Some info on Bosch Plugs:

Bosch plug numbers are decoded as follows:
W - Seat type and thread (W = M14x1.25 w/ 21mm hex)
R - Version (R = Resistor)
9 - Relative heat range (2 thru 13,lower cooler, higher hotter)
F - thread/electrode length (F = 9.5mm thread, 3mm electrode)
C - Electrode Material (C = Copper)


Is the Platinum +4 running hot (Heat Range is #9) .... What do the specs say for our cars ? I want to get these platinum plugs with 4 heads (it generates spark to 4 corners from the centre ... hence quick combustion) but I dont want to exceed the specified heat range

thanks