We just bought a real nice 1994 E320 wagon.(My first GAS MBZ) the sunroof works on the vent-up side where the back raises only. When I try to make it slide back, it only opens up about 4 to 5 inches and stops. It seems to me that it is jaming against something. Anyone with any ideas???

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My Truck.. 2007 DODGE, 5.9 Cummins, 6spd stick, 4X4. My car..1977 240D, OTHER WHEELS...1955 VW Oval window bug, European Delivery (Holland) with a 1700cc, 2 barrel, Porsche drum brakes. 1939 WILLYS Pick-up. 1967 Triumph 200cc Tiger Cub. 1976 Honda 550F 4cyl Motor Cycle.

What you need to do is clean and lube (probably several times) using the special sunroof lube. If you search you'll find the steps. If it's moving at all the motor and cable are working it's just stuck on gunk. If you burn out the motor or break the cable it's expensive to fix.

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Michael

1988 300 SL (5 Speed)
1994 E320 Wagon
1997 C230

VERY expensive.

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dtf
1994 E320 Wagon (Died @ 308,669 miles)
1995 E300 Diesel (228,000)
1999 E300 Turbodiesel ( died @ 255,000)
2006 Toyota Tundra SR5 AC 4X4 (115,000 miles) rusted frame - sold to chop shop
2011 Audi A4 Avant (165,000 miles) Seized engine - donated to Salvation Army
BMW 330 xi 6 speed manual (175,034 miles)
2014 E350 4Matic Wagon 128,000 miles
2018 Dodge Ram 21,000 miles

Michael, The slider moves freely.... It just goes so far and seems to hit a mechanical stop. Fortunately my wife doesn't use the sunroof. Our '84 300TDT had that wonderful non-electric hand operated sunroof. I personally HATE sunroofs from a mechaics point of view for just this reason. They gum up, leak and cause a guy extra maintenance. I just like to have EVERYTHING working properly.

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My Truck.. 2007 DODGE, 5.9 Cummins, 6spd stick, 4X4. My car..1977 240D, OTHER WHEELS...1955 VW Oval window bug, European Delivery (Holland) with a 1700cc, 2 barrel, Porsche drum brakes. 1939 WILLYS Pick-up. 1967 Triumph 200cc Tiger Cub. 1976 Honda 550F 4cyl Motor Cycle.

Mine did the exact same thing as yours. It worked perfectly for years and then one day would only open half way. What I did was lube the rails on the part that would open. Then close and reopen several times but only as far as it will easily open (and close). Then open, clean, and lube again. Do those steps several times cleaning out the newly dirtied up lube each time. Keep working it open more and more each time and you'll have it. Also look back into the whole assembly and make sure nothing is blocking it.

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Michael

1988 300 SL (5 Speed)
1994 E320 Wagon
1997 C230

Only use the Mercedes sunroof lube. The large cans are pretty expensive so search the forum and find the members who have sold small amounts to other members in the past. Maybe they still have some.
Good Luck, Dan

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2012 E350 Bluetech