I have reset the service interval many times over the last 7 years, but it won't reset this time. I may have had the same problem last time also, since it is now "-5200". Is it still possible to reset it even thoughit went over the "interval"? I tried about 10 times and nothing. Sometimes it would give a beep like the completion beep but it still displays "-5200".

Thanks

'98 C230

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1998 C230 330,000 miles (currently dead of second failed EIS, yours will fail too, turning you into the dealer's personal human cash machine)
1988 F150 144,000 miles (leaks all the colors of the rainbow)
Previous stars: 1981 Brava 210,000 miles, 1978 128 150,000 miles, 1977 B200 Van 175,000 miles, 1972 Vega (great, if rusty, car), 1972 Celica, 1986.5 Supra

Close the driver door.

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600SEL '91
300E 4Matic '88
240D '83
280SE '77
350SE '73
The most complex systems can fail in the simplest way.
Contra verbosus noli contendere verbis, sermo datur cunctis, animi sapientia paucis.

i don't believe in the lord! He's never bought me a Mercedes Benz.

I have the same problem with my w140 and my door is always closed because of that anoying buzzer.

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1999 w140, quit voting to old, and to old to fight, a god damned veteran

The first 5 times I tried were with the door closed. Then I tried with the door open. Then I tried again with the door closed. No difference.

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1998 C230 330,000 miles (currently dead of second failed EIS, yours will fail too, turning you into the dealer's personal human cash machine)
1988 F150 144,000 miles (leaks all the colors of the rainbow)
Previous stars: 1981 Brava 210,000 miles, 1978 128 150,000 miles, 1977 B200 Van 175,000 miles, 1972 Vega (great, if rusty, car), 1972 Celica, 1986.5 Supra

The little button may have gone bad, and isn't being recognized when pressed. Last one I saw with that problem would reset with the SDS.

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90 300TE 4-M
Turbo 103, T3/T04E 50 trim
T04B cover .60 AR
Stage 3 turbine .63 AR
A2W I/C, 40 LB/HR
MS2E, 60-2 Direct Coil Control
3" Exh, AEM W/B O2
Underdrive Alt. and P/S Pulleys,
Vented Rear Discs, .034 Booster.
3.07 diffs 1st Gear Start

90 300CE 104.980
Milled & ported head, 10.3:1 compression
197° intake cam w/20° advancer
Tuned CIS ECU
4° ignition advance
PCS TCM2000, built 722.6
600W networked suction fan
Sportline sway bars
V8 rear subframe, Quaife ATB 3.06 diff

Well, it resets the trip gauge fine, so looks like it reads the button OK.

__________________
1998 C230 330,000 miles (currently dead of second failed EIS, yours will fail too, turning you into the dealer's personal human cash machine)
1988 F150 144,000 miles (leaks all the colors of the rainbow)
Previous stars: 1981 Brava 210,000 miles, 1978 128 150,000 miles, 1977 B200 Van 175,000 miles, 1972 Vega (great, if rusty, car), 1972 Celica, 1986.5 Supra

-5300 now. There's no stopping it!!!

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1998 C230 330,000 miles (currently dead of second failed EIS, yours will fail too, turning you into the dealer's personal human cash machine)
1988 F150 144,000 miles (leaks all the colors of the rainbow)
Previous stars: 1981 Brava 210,000 miles, 1978 128 150,000 miles, 1977 B200 Van 175,000 miles, 1972 Vega (great, if rusty, car), 1972 Celica, 1986.5 Supra

If it helps at all, I've never heard of there being any problem with a reset just because you are way over on mileage or time; it should reset just as before. I don't know what else to add, you seem to have reset the FSS many times before so it's hard to believe you are doing it wrong, so I would also guess a bad cluster.
Yes the door should be closed.
Hey unless there is a problem with the drivers door jamb switch. Do you have the dome light switch set so it comes on when the door is open? If you have the switch set to "off", then the door jamb switch could be bad and you might not know it.
Gilly

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Door switch working fine, turns lights on and off. Tried to reset again today, door closed. No luck. Now at -5500....
Help someone!!! I must find a way to reset without paying the dealer a fortune.

__________________
1998 C230 330,000 miles (currently dead of second failed EIS, yours will fail too, turning you into the dealer's personal human cash machine)
1988 F150 144,000 miles (leaks all the colors of the rainbow)
Previous stars: 1981 Brava 210,000 miles, 1978 128 150,000 miles, 1977 B200 Van 175,000 miles, 1972 Vega (great, if rusty, car), 1972 Celica, 1986.5 Supra

Try unhooking the battery for half an hour or so. Its a shot in the dark, but it might do something to make the button register. Also try putting a little sideways pressure on the button while pressing it if you can. Outside of replacing the cluster......IDK

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1991 300E - 212K and rising fast...

I ordered the "38 pin reset tool" from Ebay. Worked like a charm. God bless China!

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1998 C230 330,000 miles (currently dead of second failed EIS, yours will fail too, turning you into the dealer's personal human cash machine)
1988 F150 144,000 miles (leaks all the colors of the rainbow)
Previous stars: 1981 Brava 210,000 miles, 1978 128 150,000 miles, 1977 B200 Van 175,000 miles, 1972 Vega (great, if rusty, car), 1972 Celica, 1986.5 Supra