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Old 11-04-2001, 08:13 AM
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Smile 89 300SE hesitation

My wife just purchased a 89 300SE w/147k miles. Accelerator pedal seems stiff, is there a lubrication procedure/point for the linkage. Also, when accelerating from a stop it seems to hesitate. Any ideas?

Thanks all for your help. There was more of an "operator error" than a problem. Lubricating the accelerator linkage took care of the stiff pedal. The hesitation when accelerating from a stop is more of an awareness of the vehicles size/weight/engine combination than anything else. Thanks again for helping a newbee.


Last edited by Boatguy789; 11-05-2001 at 02:06 PM.
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Old 11-04-2001, 01:09 PM
David C Klasse's Avatar
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Join Date: Jan 2001
Location: Mission Hills in the City of San Diego
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Yes, the throttle linkage is supposed to be lubed at every (or every other) service.

Also, what exactly do you mean... it hesitates when accelerating? I had a similar problem... if you search ACCELERATION RESISTANCE you'll see the post and maybe it will apply to you. Do you ever get any clunks?
2006 E350 w/ 155k miles (Daily Driver)

1993 300E 3.2L Sedan w/ close to about 300k miles
2003 E500 Brilliant Silver (Had 217k miles when totalled!)
1989 300E with 289,000 miles (had for <1 yr while in HI)
03 CLK 500 cabrio (Mom's)
2006 C230k (Dad's)
1999 S420 (Mom's/Dad's)
2000 C230k Sport sedans
2001 CLK320 Cabrio (Mom's)
1995 C280 My First Mercedes-Benz... (155k miles. EXCEPTIONAL AUTOMOBILE. Was Very hard to let go of!)
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Old 11-04-2001, 01:49 PM
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Join Date: Aug 2000
Location: Toronto, Canada
Posts: 436
Have you had a w126 before? I was very surprised at the hesitation when I first bought one. I'm on my second w126 now and it's the same. When you are at a standstill, drop the gearbox down to '2' and then put it back into drive. When you accelerate away, it will start in first gear, it should seem a lot better.
My pedal is definately very stiff compared to more modern cars, I think it's another charachteristic (poor spelling ) of the W126.
I don't know how hesitant and stiff things are in your particular car, all of the above could mean nothing!
Oliver Plante

---My Previous MBs---
87 300SE (Sold) - Black, Cream Leather
89 300SE (Sold and missed) - Black, Cream Leather
87 420SEL (Died!) - Bronze, Black Leather

---Father's Previous MB's---
2004 S320 CDi - Black, Cream Leather, 18" AMGs
2001 CL500 (Stolen!) - Black, Cream Leather
1999 E55 AMG - Black, Black Leather
1994 500SE - Black, Cream Leather
1990 300SE - Midnight Blue, Cream Leather
1986 420SEL - Diamond Blue, Cream Leather
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Old 11-04-2001, 07:59 PM
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Join Date: Feb 2001
Location: Malaysia
Posts: 1,645
Re: 89 300SE hesitation

Originally posted by Boatguy789
My wife just purchased a 89 300SE w/147k miles. Accelerator pedal seems stiff, is there a lubrication procedure/point for the linkage. Also, when accelerating from a stop it seems to hesitate. Any ideas?
The pedal is naturally stiff, unless its the late model where they advanced from the K-jet series you're currently on. You may lube it - but doubt if that would make much difference. The alternative is to insert ball-bearings at the end where the linkage pulls onto the K-jet - that would make it exceptionally smooth, so I was told as I have not modified our 300SE to this effect.

Accelerating from a stop - well, how much time does it hesitate? Its quite common for a second or so, but not longer than this. Imagine you're pulling a curb weight of (as someone said it in this forum) 3 light trucks put together. The 300SE will not give you a split response like a sportscar would. Its a luxury sedan that gives you power on the move. Be that as it may, our 300SE accelerates to 100 (from stop) within 10 seconds. Now, thats really pulling in the powerplant towards the firewall!
... Kerry

126 tailed by a 203, 129 leading the pack.
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Old 11-05-2001, 01:29 PM
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Inspect the pedal closely,126 pedals are known for breaking at the plastic hinge on the front side of the pedal where it connects to the metal rod.
this cond. makes the pedal feel funny(resistance to acceleration.
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