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  #1  
Old 09-14-2008, 08:20 PM
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w124 400E maintenance schedule?

I can't find this anywhere, warranty booklet does not list the info, and I just bought this car and cannot find a manual locally (will have to order online I suppose). So, basic Qs:

1) oil has been done every 5-7.5k, using 10w40/15w40all QS (!) and Shell (Rotella?). I will do every 5k with M1 15w50 in all likelihood.

2) Plugs were replaced at 120 and again at 133; 13k? What is the interval for plugs?

3) Trans fluid was done at 120; it's at 160 now and I plan to do it. Is it a 30k or 40k interval?

4) How are these cars on pads? They've been replaced twice since 120k, though I got 90k out of front pads on my 202 (lots of hwy)

5) cap/rotor replaced twice since 120k as well - is this a maintenance item? How often? Plug wires appear to be original - would you do them at the next plug change as a preventive measure?

I think that's it, unless I've left something else out (other than coolant, brake fluid)

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Old 09-14-2008, 10:48 PM
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most cars are every 30k miles but some are different. Every 30k should be good under normal conditons
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1986 300SDL, 211K,Dealership serviced its whole life
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1977 300D(211k)
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  #3  
Old 09-14-2008, 11:49 PM
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Yes 30K on plugs and trans fluid/filter and air filters. 60K fuel filter. No spec on diff oil, wouldn't hurt to do at about 150K.
Engine oil I recommend 1000 miles for every quart of engine capacity, that thang holds 8.5 quarts, so I would have no reservation recommending 8500 oil change on "dino" oil or 10K for synthetic.
On the pads I don't have enough info, HOW many miles on the car NOW? You just said twice since 120K........The V8 cars seem to go through pads a bit faster than the 6 cyl gassers. Is the 400 also used mostly on highways or are we comparing apples to oranges? I'd suspect front pads, maybe 30-45K miles on the pads, and rotors every other set of pads, if mostly used on the highway.
Brake fluid every 2 yrs, coolant every 3. Use the MB brake fluid or a good DOT4+. Use MB coolant or Zerez G05

Gilly
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Old 09-14-2008, 11:59 PM
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I don't believe there is an interval on the caps/rotors but 60k seems to be about the norm.
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  #5  
Old 09-15-2008, 12:10 AM
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Correct, I forgot that part. I wouldn't replace the ignition wires for no reason, either. If you get the Bosch caps and rotors should go to 100K under normal conditions.
Gilly
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Old 09-15-2008, 01:36 AM
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I have a 93 that for some reason uses 92 front pads. Here's my mileage for replacements over the past few years. I always use factory pads and I don't drive aggressively. I change the pads as soon as I get the indicator light.

148,500
179,007
195,075
210,493
228,947
252,502
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1994 E420, 200,000+ miles
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Old 09-15-2008, 09:47 AM
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My wife's 1992 300CE needs new front brake pads every 15,000 miles. She drives conservatively, but has a 50/50 mix of city and highway driving.
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  #8  
Old 09-15-2008, 11:19 AM
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Great info! Thanks

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