Okay - most of the things on the MB need special tools to repair. So you will have to look at is really good to see if one of your tools can work or if you have to purchase one.
Also, I would check with the dealer to see the cost......just for an estimate. You may have enough.
Here is the info on the replacement...........hope that helps...........
CHECKING THE NOZZLE GASKET IN THE TANK FILLER NECK FOR DAMAGE AND REPLACING IT - AP47.10-P-4751A
MODEL 129, 170, 210, 220 with CODE (491) U.S. version
Model 210 illustrated
Fig. 88: Identifying Nozzle Gasket And Guide Sleeve (Model 210)
Risk of explosion caused by ignition of flammable products, risk of poisoning caused by inhaling fuel vapors or swallowing fuel as well as risk of injury to skin and eyes exposed to fuel.
No fire, sparks, open flames or smoking.
Pour fuels only into suitable and appropriately marked containers.
Wear protective clothing when handling fuel.
Replace the nozzle gasket (80/20)
If the lip of the nozzle (80/20)is damaged.
Release the guide sleeve (80/21) using pliers and take it out.
Guide sleeve (80/21) with index (4) in model 129, 170, 210 up to September 98
Guide sleeve (80/21) with index (5) in model 220 Sept. to December 98 and in model 129, 170, 210 Oct. to December 98
Guide sleeve (80/21) with index (6) in model 129, 170, 210 and 220 as of January 99
Guide sleeve modified Model 129, 170, 210
Install in the reverse order
Sunday, December 20th, 2009 AT 12:26 PM