Both of mine work...but I do have a slow vacuum leak in the W116 I need to find.

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Proud owner of ....
1971 280SE W108
1979 300SD W116
1983 300D W123
1975 Ironhead Sportster chopper
1987 GMC 3/4 ton 4X4 Diesel
1989 Honda Civic (Heavily modified)
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Section 609 MVAC Certified
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"He who fights with monsters might take care lest he thereby become a monster. And if you gaze for long into an abyss, the abyss gazes also into you." - Friedrich Nietzsche

They work fine on both of mine. Most of them don't work because people don't fix them when they break. The W126 at least has two vac systems so leaks in the door locks are simpler to track down.

Afaik MB used vac locks right up to 1999, with the last of the W140's. Do the W210's have vac locks? I never noticed.

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1999 SL500
1969 280SE
2023 Ram 1500
2007 Tiara 3200

Both my W123s work just fine. My 300D stopped working a couple of years ago, and it took a couple of hours to track it down and fix it (fuel door). These are usually easy and cheap to fix if you are willing to spend a little time.

SDL works 100%, SD is odd... only passenger door opens all and locks all. There is a problem gettin' the power to the driver door.

The harness was melted it appeared (NO clue how), so next outing to the boneyard I'll have myself a new harness to install from there into the vehicle. Then they should be 100% on the SD.

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I'm not a doctor, but I'll have a look.

'85 300SD 245k
'87 300SDL 251k
'90 300SEL 326k

Six others from BMW, GM, and Ford.

Liberty will not descend to a people; a people must raise themselves to liberty.[/IMG]

all mine work, 86 500SEL,85 230TE and 90 300SE

Had and '89, a '90 and now a '92. Locks have all worked fine. My '90 required a minor adjustment to the physical driver's lock (somehow got bent inside the door) and we preventing it from locking. But I've yet to see one on my W124's fail. Of course.. I'm not jinxed!

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Locks on my 76 450SEL do not work; I just need to find the leak point and fix it tho' --- I don't think it is a major problem. My 89 420SEL locks work perfectly, as do the electric ones on my 99ML. The Corvette is set to lock and unlock when the electronic remote is near the car -- no problem with that system!

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Ben Harrison Carter
1999 Mercedes ML320 87K
1992 Mercedes 300CE 89K
1995 Corvette 29K -- Sold Dec 09
1989 Mercedes 420SEL 99K -- (Sold 4/08)
1968 Mercedes 230S (106K) (Sold 9/06))
1976 Mercedes 450SEL 130K (Just sold - 06)
1961 Mercedes 220Sb (sold years ago)

I have several vacuum pods for the W114/5 bodies laying around if that will help anybody

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Ron
2015 Porsche Cayman - Elizabeth
2011 Porsche Cayman - Bond,James Bond
Sadly MERCEDESLESS - ALways LOOKING !
99 E320 THE Queen Mary - SOLD
62 220b - Dolly - Finally my Finny! Sadly SOLD
72 450SL, Pearl-SOLD
16 F350 6.7 Diesel -THOR
19 BMW X5 - Heaven on Wheels
14 38HP John Deere 3038E Tractor -Mean Green
84 300SD, Benjamin -SOLD
71 220 - W115-Libby ( my first love) -SOLD
73 280 - W114 "Organspende" Rest in Peace
81 380 SL - Rest in Peace

The driver side door lock on my '93 190e was not working while all 4 others were just fine. Obviously the vacuum pump was OK and I suspected bent linkages or some such thing..... but before pulling the door panel off for access I dripped some WD40 and oil down the door lock post after first unscrewing it. voila, the key again turned and the post came down and locked again.

cheers, guenter

ps never had a problem with locks on my '89 300e, and this problem was minor.

All my locks work and work good

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1985 Euro 240D 5 spd 140K
1979 240D 5 spd, 40K on engine rebuild
1994 Dodge/Cummins, 5 spd, 121K
1964 Allice Chalmers D15 tractor
2014 Kubota L3800 tractor
1964 VW bug

"Lifes too short to drive a boring car"

Mine work, '91 300SE, thats how I also found out that the alarm works too. I did have a minor glitch for a little while, only driver door would lock/unlock, passenger door and bootlid would work correctly for all. I guess the 'lil gremlin' left because suddenly and without me doing anything to the system driver door works for all others
BTW, my clock and all gauges work, not bad for a 14YO car

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1991 300SE (my ride, 279,000 miles, looks almost new
1954 Cadillac (21 yo son's car, he bought when age 15)
1972 SeaBird 19 ft runabout (old but solid, slant six, Volvo sterndrive perfect condition, undergoing complete overhaul and refit)
1998 Toyota Rav4 (my sons daily driver when he is in the Continental US, PROUDLY serving in US Navy)

Driver's door doesn't lock/unlock the whole car. Have to use the passenger door or trunk.

Any help would be appreciated as it's a pain....

Thanks.

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2003 E500
2002 C230 Kompressor
1986 420SEL

Anyone have an idea where to start in resolving this problem?

I friend of mine has the same problem in their 420SEL but I would like to have some ideas where to start before tearing the door apart.

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1974 240D 3.0L 4(M) - 250K -OM617.910 + 300D FW + Rajay turbo power!
1977 6.9 3(A) - 84k

Join the party. Maybe the handle is bad or corroded? I wish I could figure out how to pop it out.

I'm almost to the point where I'm going to install a keyless system to lock/unlock them all at once so I don't have to deal with the doors. Yet, I really need to fix it properly first.

Since this thread, I have the 420... they all work there too.

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I'm not a doctor, but I'll have a look.

'85 300SD 245k
'87 300SDL 251k
'90 300SEL 326k

Six others from BMW, GM, and Ford.

Liberty will not descend to a people; a people must raise themselves to liberty.[/IMG]

Mine work fine; always have, I figure, since the PO did not repair anything that wasn't necessary. Prety good reliability: 20 years. What do you want?