Oil change on 126

This might be elementary, but need some help. I was trying to drain oil from my 89 300 SE. I tried in vain to open the drain plug for 2 hours. I am well aware of the righty-tighty/lefty-loosey and still did not work. I talked to a MB dealership tech and he said if it's stuck, have at it with a vice grip and change the drain plug. I have screwed the head of the old drain plug and no oil draining yet. Any advice from you senior techs??? Please help!
Raghu
89 300SE, 91 300 SEL

[unkl300d]

Same thing almost happened to me.
My 300SE drain plug would not
budge even after the liquid wrench.
I decided not to tempt fate and just
took it in for an oil change. No problem.
More arm pull space at a shop.
Any way I had thought ahead
of the option of using a pump device down the
dipstick tube to get the oil out.
Search the archives for the name of this
device.
Good luck

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1979 300D
133K miles
1989 300SE
1995 C280

When change my oil, I make sure I use the copper gasket that costs extra when you buy filters. It seems to make removing oil drain plug easier and seal better,but I still have to use breaker bar with socket to get it lose.

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Jerry O
1987 260E 175k miles

[jylee]

You can buy a wrench MB and Impco , the wrench is used to remove drain plug and rear differential, or just use a 13mm box wrench. Most of the 10 minute oil change outfit do not change out the copper washer, and over tight the plug.

jack