Well i'll put it simply, a cheap benz is an expensive benz, and i know we can all agree on that. These cars arn't just hope in and go kind of cars. Proper maint. and servicing is a well known fact (hence the forum DIY) so its up to how much you really enjoy the car. Put money into it, or sell it

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1983 Euro 240D 277K
2016 Mazda 6
Coming Soon, 2013 Mercedes E350 Bluetec
Formers:
2012- Mazda 3
2007 Outlander- complete pile
1995 E300 Diesel 208K
2007 VW Passat 2.0T 63K SOLD
2003 Jaguar X-type 3.0 Sport Sold 04/11 w/88K
2009 Lexus RX350 9061 miles. Sold 04/09
2008 Mitsubishi Lancer GTS:Totaled Sept.,09 @ 24,000
2003 Infiniti I35 58K Sold
1984 300 turbo diesel 222K